diff --git a/.github/workflows/bsd.yml b/.github/workflows/bsd.yml
index db234965ba..1156a3b4ee 100644
--- a/.github/workflows/bsd.yml
+++ b/.github/workflows/bsd.yml
@@ -12,11 +12,12 @@ permissions:
   contents: read
 
 env:
+  GNU_TAR_VERSION: "1.35"
+  GO_VERSION_DRAGONFLY: "1.23.3"
   GO_VERSION_FREEBSD: "123"
-  GO_VERSION_OPENBSD: "1.23.1"
   GO_VERSION_NETBSD: "123"
-  GO_VERSION_DRAGONFLY: "1.23.3"
-  GNU_TAR_VERSION: "1.35"
+  GO_VERSION_OPENBSD: "1.23.1"
+  GO_VERSION_SOLARIS: "1.23.3"
 
 # To spin up one of the VMs below, see the "Debug Shell" section here: https://github.com/vmactions
 jobs:
@@ -34,7 +35,16 @@ jobs:
           usesh: true
           prepare: |
             pkg update -f
-            pkg install -y bash curl gtar git gmake gsed gnugrep go${GO_VERSION_FREEBSD} python
+            pkg install -y \
+              bash \
+              git \
+              gmake \
+              gnugrep \
+              go${GO_VERSION_FREEBSD} \
+              gsed \
+              gtar \
+              python \
+              wget
           run: |
             echo "::group::Setup prerequisites"
             set -eu
@@ -72,7 +82,16 @@ jobs:
           usesh: true
           prepare: |
             pkg_add -u
-            pkg_add bash curl gtar-${GNU_TAR_VERSION}p0-static git gmake gsed ggrep go-${GO_VERSION_OPENBSD} python
+            pkg_add \
+              bash \
+              ggrep \
+              git \
+              gmake \
+              go-${GO_VERSION_OPENBSD} \
+              gsed \
+              gtar-${GNU_TAR_VERSION}p0-static \
+              python \
+              wget
           run: |
             echo "::group::Setup prerequisites"
             set -eu
@@ -109,7 +128,15 @@ jobs:
           usesh: true
           prepare: |
             /usr/sbin/pkg_add -u
-            /usr/sbin/pkg_add curl gtar-base-${GNU_TAR_VERSION} git gmake gsed grep go${GO_VERSION_NETBSD} python312
+            /usr/sbin/pkg_add \
+              git \
+              gmake \
+              go${GO_VERSION_NETBSD} \
+              grep \
+              gsed \
+              gtar-base-${GNU_TAR_VERSION}\
+              python312 \
+              wget
           run: |
             echo "::group::Setup prerequisites"
             set -eu
@@ -147,14 +174,23 @@ jobs:
           usesh: true
           prepare: |
             pkg update && pkg upgrade -y
-            pkg install -y bash wget gtar git gmake gsed gnugrep python3
+            pkg install -y \
+              bash \
+              git \
+              gmake \
+              gnugrep \
+              gsed \
+              gtar \
+              python3 \
+              wget
           run: |
             echo "::group::Setup prerequisites"
             set -eu
             mkdir bin
             export PATH=$(pwd)/bin:$PATH
-            wget https://go.dev/dl/go${GO_VERSION_DRAGONFLY}.dragonfly-amd64.tar.gz
-            gtar xzf go${GO_VERSION_DRAGONFLY}.dragonfly-amd64.tar.gz
+            GOGZ="go${GO_VERSION_DRAGONFLY}.dragonfly-amd64.tar.gz"
+            wget https://go.dev/dl/${GOGZ}
+            gtar xzf ${GOGZ}
             ln -s $(pwd)/go/bin/go $(pwd)/bin/go
             ln -s $(which ggrep) $(pwd)/bin/grep
             ln -s $(which gmake) $(pwd)/bin/make
@@ -173,3 +209,103 @@ jobs:
             git config --global --add safe.directory $(pwd)
             gmake test-e2e
             echo "::endgroup::"
+
+  test_solaris:
+    name: Run end-to-end tests on Solaris
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+      - name: test-e2e
+        uses: vmactions/solaris-vm@v1
+        with:
+          copyback: false
+          envs: 'GO_VERSION_SOLARIS'
+          usesh: true
+          prepare: |
+            pkg update
+            pkg install \
+              bash \
+              curl \
+              gcc \
+              git \
+              gnu-grep \
+              gnu-make \
+              gnu-sed \
+              gnu-tar
+          run: |
+            echo "::group::Setup prerequisites"
+            set -eu
+            mkdir bin
+            export PATH=$(pwd)/bin:$PATH
+            GOGZ="go${GO_VERSION_SOLARIS}.solaris-amd64.tar.gz"
+            wget https://go.dev/dl/${GOGZ}
+            gtar xzf ${GOGZ}
+            ln -s $(pwd)/go/bin/go $(pwd)/bin/go
+            ln -s $(which ggrep) $(pwd)/bin/grep
+            ln -s $(which gmake) $(pwd)/bin/make
+            ln -s $(which gsed) $(pwd)/bin/sed
+            ln -s $(which gtar) $(pwd)/bin/tar
+            
+            echo ">> building promu as it is not shipped for Solaris"
+            git clone https://github.com/prometheus/promu.git
+            cd promu
+            go build .
+            cd -
+            
+            mkdir -p $(go env GOPATH)/bin
+            ln -s $(pwd)/promu/promu $(go env GOPATH)/bin/promu
+            export PATH=$(go env GOPATH)/bin:$PATH
+            echo "::endgroup::"
+
+            echo "::group::Print environment information"
+            uname -a
+            echo "GOOS: $(go env GOOS)"
+            echo "GOARCH: $(go env GOARCH)"
+            echo "::endgroup::"
+
+            echo "::group::Run End-to-End Tests"
+            git config --global --add safe.directory $(pwd)
+            make test-e2e
+            echo "::endgroup::"
+
+  test_macos:
+    name: Run end-to-end tests on macOS
+    runs-on: macos-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          brew install \
+            bash \
+            curl \
+            git \
+            grep \
+            make \
+            gnu-sed \
+            gnu-tar \
+            go \
+            python3
+      - name: test-e2e
+        run: |
+          echo "::group::Setup prerequisites"
+          set -eu
+          mkdir bin
+          ln -s $(which ggrep) $(pwd)/bin/grep
+          ln -s $(which gmake) $(pwd)/bin/make
+          ln -s $(which gsed) $(pwd)/bin/sed
+          ln -s $(which gtar) $(pwd)/bin/tar
+          export PATH=$(pwd)/bin:$PATH
+          echo "::endgroup::"
+
+          echo "::group::Print environment information"
+          uname -a
+          echo "GOOS: $(go env GOOS)"
+          echo "GOARCH: $(go env GOARCH)"
+          echo "::endgroup::"
+
+          echo "::group::Run End-to-End Tests"
+          git config --global --add safe.directory $(pwd)
+          make test-e2e
+          echo "::endgroup::"
diff --git a/collector/fixtures/e2e-output-darwin.txt b/collector/fixtures/e2e-output-darwin.txt
new file mode 100644
index 0000000000..2197a9efa6
--- /dev/null
+++ b/collector/fixtures/e2e-output-darwin.txt
@@ -0,0 +1,279 @@
+# HELP go_gc_duration_seconds A summary of the wall-time pause (stop-the-world) duration in garbage collection cycles.
+# TYPE go_gc_duration_seconds summary
+# HELP go_gc_gogc_percent Heap size target percentage configured by the user, otherwise 100. This value is set by the GOGC environment variable, and the runtime/debug.SetGCPercent function. Sourced from /gc/gogc:percent
+# TYPE go_gc_gogc_percent gauge
+# HELP go_gc_gomemlimit_bytes Go runtime memory limit configured by the user, otherwise math.MaxInt64. This value is set by the GOMEMLIMIT environment variable, and the runtime/debug.SetMemoryLimit function. Sourced from /gc/gomemlimit:bytes
+# TYPE go_gc_gomemlimit_bytes gauge
+# HELP go_goroutines Number of goroutines that currently exist.
+# TYPE go_goroutines gauge
+# HELP go_info Information about the Go environment.
+# TYPE go_info gauge
+# HELP go_memstats_alloc_bytes Number of bytes allocated in heap and currently in use. Equals to /memory/classes/heap/objects:bytes.
+# TYPE go_memstats_alloc_bytes gauge
+# HELP go_memstats_alloc_bytes_total Total number of bytes allocated in heap until now, even if released already. Equals to /gc/heap/allocs:bytes.
+# TYPE go_memstats_alloc_bytes_total counter
+# HELP go_memstats_buck_hash_sys_bytes Number of bytes used by the profiling bucket hash table. Equals to /memory/classes/profiling/buckets:bytes.
+# TYPE go_memstats_buck_hash_sys_bytes gauge
+# HELP go_memstats_frees_total Total number of heap objects frees. Equals to /gc/heap/frees:objects + /gc/heap/tiny/allocs:objects.
+# TYPE go_memstats_frees_total counter
+# HELP go_memstats_gc_sys_bytes Number of bytes used for garbage collection system metadata. Equals to /memory/classes/metadata/other:bytes.
+# TYPE go_memstats_gc_sys_bytes gauge
+# HELP go_memstats_heap_alloc_bytes Number of heap bytes allocated and currently in use, same as go_memstats_alloc_bytes. Equals to /memory/classes/heap/objects:bytes.
+# TYPE go_memstats_heap_alloc_bytes gauge
+# HELP go_memstats_heap_idle_bytes Number of heap bytes waiting to be used. Equals to /memory/classes/heap/released:bytes + /memory/classes/heap/free:bytes.
+# TYPE go_memstats_heap_idle_bytes gauge
+# HELP go_memstats_heap_inuse_bytes Number of heap bytes that are in use. Equals to /memory/classes/heap/objects:bytes + /memory/classes/heap/unused:bytes
+# TYPE go_memstats_heap_inuse_bytes gauge
+# HELP go_memstats_heap_objects Number of currently allocated objects. Equals to /gc/heap/objects:objects.
+# TYPE go_memstats_heap_objects gauge
+# HELP go_memstats_heap_released_bytes Number of heap bytes released to OS. Equals to /memory/classes/heap/released:bytes.
+# TYPE go_memstats_heap_released_bytes gauge
+# HELP go_memstats_heap_sys_bytes Number of heap bytes obtained from system. Equals to /memory/classes/heap/objects:bytes + /memory/classes/heap/unused:bytes + /memory/classes/heap/released:bytes + /memory/classes/heap/free:bytes.
+# TYPE go_memstats_heap_sys_bytes gauge
+# HELP go_memstats_last_gc_time_seconds Number of seconds since 1970 of last garbage collection.
+# TYPE go_memstats_last_gc_time_seconds gauge
+# HELP go_memstats_mallocs_total Total number of heap objects allocated, both live and gc-ed. Semantically a counter version for go_memstats_heap_objects gauge. Equals to /gc/heap/allocs:objects + /gc/heap/tiny/allocs:objects.
+# TYPE go_memstats_mallocs_total counter
+# HELP go_memstats_mcache_inuse_bytes Number of bytes in use by mcache structures. Equals to /memory/classes/metadata/mcache/inuse:bytes.
+# TYPE go_memstats_mcache_inuse_bytes gauge
+# HELP go_memstats_mcache_sys_bytes Number of bytes used for mcache structures obtained from system. Equals to /memory/classes/metadata/mcache/inuse:bytes + /memory/classes/metadata/mcache/free:bytes.
+# TYPE go_memstats_mcache_sys_bytes gauge
+# HELP go_memstats_mspan_inuse_bytes Number of bytes in use by mspan structures. Equals to /memory/classes/metadata/mspan/inuse:bytes.
+# TYPE go_memstats_mspan_inuse_bytes gauge
+# HELP go_memstats_mspan_sys_bytes Number of bytes used for mspan structures obtained from system. Equals to /memory/classes/metadata/mspan/inuse:bytes + /memory/classes/metadata/mspan/free:bytes.
+# TYPE go_memstats_mspan_sys_bytes gauge
+# HELP go_memstats_next_gc_bytes Number of heap bytes when next garbage collection will take place. Equals to /gc/heap/goal:bytes.
+# TYPE go_memstats_next_gc_bytes gauge
+# HELP go_memstats_other_sys_bytes Number of bytes used for other system allocations. Equals to /memory/classes/other:bytes.
+# TYPE go_memstats_other_sys_bytes gauge
+# HELP go_memstats_stack_inuse_bytes Number of bytes obtained from system for stack allocator in non-CGO environments. Equals to /memory/classes/heap/stacks:bytes.
+# TYPE go_memstats_stack_inuse_bytes gauge
+# HELP go_memstats_stack_sys_bytes Number of bytes obtained from system for stack allocator. Equals to /memory/classes/heap/stacks:bytes + /memory/classes/os-stacks:bytes.
+# TYPE go_memstats_stack_sys_bytes gauge
+# HELP go_memstats_sys_bytes Number of bytes obtained from system. Equals to /memory/classes/total:byte.
+# TYPE go_memstats_sys_bytes gauge
+# HELP go_sched_gomaxprocs_threads The current runtime.GOMAXPROCS setting, or the number of operating system threads that can execute user-level Go code simultaneously. Sourced from /sched/gomaxprocs:threads
+# TYPE go_sched_gomaxprocs_threads gauge
+# HELP go_threads Number of OS threads created.
+# TYPE go_threads gauge
+# HELP node_buddyinfo_blocks Count of free blocks according to size.
+# TYPE node_buddyinfo_blocks gauge
+node_buddyinfo_blocks{node="0",size="0",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="0",zone="DMA32"} 759
+node_buddyinfo_blocks{node="0",size="0",zone="Normal"} 4381
+node_buddyinfo_blocks{node="0",size="1",zone="DMA"} 0
+node_buddyinfo_blocks{node="0",size="1",zone="DMA32"} 572
+node_buddyinfo_blocks{node="0",size="1",zone="Normal"} 1093
+node_buddyinfo_blocks{node="0",size="10",zone="DMA"} 3
+node_buddyinfo_blocks{node="0",size="10",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="10",zone="Normal"} 0
+node_buddyinfo_blocks{node="0",size="2",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="2",zone="DMA32"} 791
+node_buddyinfo_blocks{node="0",size="2",zone="Normal"} 185
+node_buddyinfo_blocks{node="0",size="3",zone="DMA"} 0
+node_buddyinfo_blocks{node="0",size="3",zone="DMA32"} 475
+node_buddyinfo_blocks{node="0",size="3",zone="Normal"} 1530
+node_buddyinfo_blocks{node="0",size="4",zone="DMA"} 2
+node_buddyinfo_blocks{node="0",size="4",zone="DMA32"} 194
+node_buddyinfo_blocks{node="0",size="4",zone="Normal"} 567
+node_buddyinfo_blocks{node="0",size="5",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="5",zone="DMA32"} 45
+node_buddyinfo_blocks{node="0",size="5",zone="Normal"} 102
+node_buddyinfo_blocks{node="0",size="6",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="6",zone="DMA32"} 12
+node_buddyinfo_blocks{node="0",size="6",zone="Normal"} 4
+node_buddyinfo_blocks{node="0",size="7",zone="DMA"} 0
+node_buddyinfo_blocks{node="0",size="7",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="7",zone="Normal"} 0
+node_buddyinfo_blocks{node="0",size="8",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="8",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="8",zone="Normal"} 0
+node_buddyinfo_blocks{node="0",size="9",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="9",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="9",zone="Normal"} 0
+# HELP node_disk_read_errors_total The total number of read errors.
+# TYPE node_disk_read_errors_total counter
+node_disk_read_errors_total{device="disk0"} 0
+# HELP node_disk_read_retries_total The total number of read retries.
+# TYPE node_disk_read_retries_total counter
+node_disk_read_retries_total{device="disk0"} 0
+# HELP node_disk_write_errors_total The total number of write errors.
+# TYPE node_disk_write_errors_total counter
+node_disk_write_errors_total{device="disk0"} 0
+# HELP node_disk_write_retries_total The total number of write retries.
+# TYPE node_disk_write_retries_total counter
+node_disk_write_retries_total{device="disk0"} 0
+# HELP node_exporter_build_info A metric with a constant '1' value labeled by version, revision, branch, goversion from which node_exporter was built, and the goos and goarch for the build.
+# TYPE node_exporter_build_info gauge
+# HELP node_memory_swap_total_bytes Memory information field swap_total_bytes.
+# TYPE node_memory_swap_total_bytes gauge
+node_memory_swap_total_bytes 0
+# HELP node_memory_swap_used_bytes Memory information field swap_used_bytes.
+# TYPE node_memory_swap_used_bytes gauge
+node_memory_swap_used_bytes 0
+# HELP node_memory_total_bytes Memory information field total_bytes.
+# TYPE node_memory_total_bytes gauge
+node_memory_total_bytes 7.516192768e+09
+# HELP node_network_noproto_total Network device statistic noproto.
+# TYPE node_network_noproto_total counter
+node_network_noproto_total{device="lo0"} 0
+# HELP node_network_receive_bytes_total Network device statistic receive_bytes.
+# TYPE node_network_receive_bytes_total counter
+# HELP node_network_receive_drop_total Network device statistic receive_drop.
+# TYPE node_network_receive_drop_total counter
+node_network_receive_drop_total{device="lo0"} 0
+# HELP node_network_receive_errs_total Network device statistic receive_errs.
+# TYPE node_network_receive_errs_total counter
+node_network_receive_errs_total{device="lo0"} 0
+# HELP node_network_receive_packets_total Network device statistic receive_packets.
+# TYPE node_network_receive_packets_total counter
+# HELP node_network_transmit_bytes_total Network device statistic transmit_bytes.
+# TYPE node_network_transmit_bytes_total counter
+# HELP node_network_transmit_colls_total Network device statistic transmit_colls.
+# TYPE node_network_transmit_colls_total counter
+node_network_transmit_colls_total{device="lo0"} 0
+# HELP node_network_transmit_errs_total Network device statistic transmit_errs.
+# TYPE node_network_transmit_errs_total counter
+node_network_transmit_errs_total{device="lo0"} 0
+# HELP node_network_transmit_packets_total Network device statistic transmit_packets.
+# TYPE node_network_transmit_packets_total counter
+# HELP node_os_info A metric with a constant '1' value labeled by build_id, id, id_like, image_id, image_version, name, pretty_name, variant, variant_id, version, version_codename, version_id.
+# TYPE node_os_info gauge
+node_os_info{build_id="",id="ubuntu",id_like="debian",image_id="",image_version="",name="Ubuntu",pretty_name="Ubuntu 20.04.2 LTS",variant="",variant_id="",version="20.04.2 LTS (Focal Fossa)",version_codename="focal",version_id="20.04"} 1
+# HELP node_os_version Metric containing the major.minor part of the OS version.
+# TYPE node_os_version gauge
+node_os_version{id="ubuntu",id_like="debian",name="Ubuntu"} 20.04
+# HELP node_scrape_collector_duration_seconds node_exporter: Duration of a collector scrape.
+# TYPE node_scrape_collector_duration_seconds gauge
+# HELP node_scrape_collector_success node_exporter: Whether a collector succeeded.
+# TYPE node_scrape_collector_success gauge
+node_scrape_collector_success{collector="boottime"} 1
+node_scrape_collector_success{collector="buddyinfo"} 1
+node_scrape_collector_success{collector="cpu"} 1
+node_scrape_collector_success{collector="diskstats"} 1
+node_scrape_collector_success{collector="loadavg"} 1
+node_scrape_collector_success{collector="meminfo"} 1
+node_scrape_collector_success{collector="netdev"} 1
+node_scrape_collector_success{collector="os"} 1
+node_scrape_collector_success{collector="powersupplyclass"} 1
+node_scrape_collector_success{collector="textfile"} 1
+node_scrape_collector_success{collector="thermal"} 0
+node_scrape_collector_success{collector="time"} 1
+node_scrape_collector_success{collector="xfrm"} 1
+# HELP node_textfile_mtime_seconds Unixtime mtime of textfiles successfully read.
+# TYPE node_textfile_mtime_seconds gauge
+# HELP node_textfile_scrape_error 1 if there was an error opening or reading a file, 0 otherwise
+# TYPE node_textfile_scrape_error gauge
+node_textfile_scrape_error 0
+# HELP node_time_seconds System time in seconds since epoch (1970).
+# TYPE node_time_seconds gauge
+# HELP node_time_zone_offset_seconds System time zone offset in seconds.
+# TYPE node_time_zone_offset_seconds gauge
+# HELP node_xfrm_acquire_error_packets_total State hasn’t been fully acquired before use
+# TYPE node_xfrm_acquire_error_packets_total counter
+node_xfrm_acquire_error_packets_total 24532
+# HELP node_xfrm_fwd_hdr_error_packets_total Forward routing of a packet is not allowed
+# TYPE node_xfrm_fwd_hdr_error_packets_total counter
+node_xfrm_fwd_hdr_error_packets_total 6654
+# HELP node_xfrm_in_buffer_error_packets_total No buffer is left
+# TYPE node_xfrm_in_buffer_error_packets_total counter
+node_xfrm_in_buffer_error_packets_total 2
+# HELP node_xfrm_in_error_packets_total All errors not matched by other
+# TYPE node_xfrm_in_error_packets_total counter
+node_xfrm_in_error_packets_total 1
+# HELP node_xfrm_in_hdr_error_packets_total Header error
+# TYPE node_xfrm_in_hdr_error_packets_total counter
+node_xfrm_in_hdr_error_packets_total 4
+# HELP node_xfrm_in_no_pols_packets_total No policy is found for states e.g. Inbound SAs are correct but no SP is found
+# TYPE node_xfrm_in_no_pols_packets_total counter
+node_xfrm_in_no_pols_packets_total 65432
+# HELP node_xfrm_in_no_states_packets_total No state is found i.e. Either inbound SPI, address, or IPsec protocol at SA is wrong
+# TYPE node_xfrm_in_no_states_packets_total counter
+node_xfrm_in_no_states_packets_total 3
+# HELP node_xfrm_in_pol_block_packets_total Policy discards
+# TYPE node_xfrm_in_pol_block_packets_total counter
+node_xfrm_in_pol_block_packets_total 100
+# HELP node_xfrm_in_pol_error_packets_total Policy error
+# TYPE node_xfrm_in_pol_error_packets_total counter
+node_xfrm_in_pol_error_packets_total 10000
+# HELP node_xfrm_in_state_expired_packets_total State is expired
+# TYPE node_xfrm_in_state_expired_packets_total counter
+node_xfrm_in_state_expired_packets_total 7
+# HELP node_xfrm_in_state_invalid_packets_total State is invalid
+# TYPE node_xfrm_in_state_invalid_packets_total counter
+node_xfrm_in_state_invalid_packets_total 55555
+# HELP node_xfrm_in_state_mismatch_packets_total State has mismatch option e.g. UDP encapsulation type is mismatch
+# TYPE node_xfrm_in_state_mismatch_packets_total counter
+node_xfrm_in_state_mismatch_packets_total 23451
+# HELP node_xfrm_in_state_mode_error_packets_total Transformation mode specific error
+# TYPE node_xfrm_in_state_mode_error_packets_total counter
+node_xfrm_in_state_mode_error_packets_total 100
+# HELP node_xfrm_in_state_proto_error_packets_total Transformation protocol specific error e.g. SA key is wrong
+# TYPE node_xfrm_in_state_proto_error_packets_total counter
+node_xfrm_in_state_proto_error_packets_total 40
+# HELP node_xfrm_in_state_seq_error_packets_total Sequence error i.e. Sequence number is out of window
+# TYPE node_xfrm_in_state_seq_error_packets_total counter
+node_xfrm_in_state_seq_error_packets_total 6000
+# HELP node_xfrm_in_tmpl_mismatch_packets_total No matching template for states e.g. Inbound SAs are correct but SP rule is wrong
+# TYPE node_xfrm_in_tmpl_mismatch_packets_total counter
+node_xfrm_in_tmpl_mismatch_packets_total 51
+# HELP node_xfrm_out_bundle_check_error_packets_total Bundle check error
+# TYPE node_xfrm_out_bundle_check_error_packets_total counter
+node_xfrm_out_bundle_check_error_packets_total 555
+# HELP node_xfrm_out_bundle_gen_error_packets_total Bundle generation error
+# TYPE node_xfrm_out_bundle_gen_error_packets_total counter
+node_xfrm_out_bundle_gen_error_packets_total 43321
+# HELP node_xfrm_out_error_packets_total All errors which is not matched others
+# TYPE node_xfrm_out_error_packets_total counter
+node_xfrm_out_error_packets_total 1e+06
+# HELP node_xfrm_out_no_states_packets_total No state is found
+# TYPE node_xfrm_out_no_states_packets_total counter
+node_xfrm_out_no_states_packets_total 869
+# HELP node_xfrm_out_pol_block_packets_total Policy discards
+# TYPE node_xfrm_out_pol_block_packets_total counter
+node_xfrm_out_pol_block_packets_total 43456
+# HELP node_xfrm_out_pol_dead_packets_total Policy is dead
+# TYPE node_xfrm_out_pol_dead_packets_total counter
+node_xfrm_out_pol_dead_packets_total 7656
+# HELP node_xfrm_out_pol_error_packets_total Policy error
+# TYPE node_xfrm_out_pol_error_packets_total counter
+node_xfrm_out_pol_error_packets_total 1454
+# HELP node_xfrm_out_state_expired_packets_total State is expired
+# TYPE node_xfrm_out_state_expired_packets_total counter
+node_xfrm_out_state_expired_packets_total 565
+# HELP node_xfrm_out_state_invalid_packets_total State is invalid, perhaps expired
+# TYPE node_xfrm_out_state_invalid_packets_total counter
+node_xfrm_out_state_invalid_packets_total 28765
+# HELP node_xfrm_out_state_mode_error_packets_total Transformation mode specific error
+# TYPE node_xfrm_out_state_mode_error_packets_total counter
+node_xfrm_out_state_mode_error_packets_total 8
+# HELP node_xfrm_out_state_proto_error_packets_total Transformation protocol specific error
+# TYPE node_xfrm_out_state_proto_error_packets_total counter
+node_xfrm_out_state_proto_error_packets_total 4542
+# HELP node_xfrm_out_state_seq_error_packets_total Sequence error i.e. Sequence number overflow
+# TYPE node_xfrm_out_state_seq_error_packets_total counter
+node_xfrm_out_state_seq_error_packets_total 543
+# HELP promhttp_metric_handler_errors_total Total number of internal errors encountered by the promhttp metric handler.
+# TYPE promhttp_metric_handler_errors_total counter
+promhttp_metric_handler_errors_total{cause="encoding"} 0
+promhttp_metric_handler_errors_total{cause="gathering"} 0
+# HELP promhttp_metric_handler_requests_in_flight Current number of scrapes being served.
+# TYPE promhttp_metric_handler_requests_in_flight gauge
+promhttp_metric_handler_requests_in_flight 1
+# HELP promhttp_metric_handler_requests_total Total number of scrapes by HTTP status code.
+# TYPE promhttp_metric_handler_requests_total counter
+promhttp_metric_handler_requests_total{code="200"} 0
+promhttp_metric_handler_requests_total{code="500"} 0
+promhttp_metric_handler_requests_total{code="503"} 0
+# HELP testmetric1_1 Metric read from collector/fixtures/textfile/two_metric_files/metrics1.prom
+# TYPE testmetric1_1 untyped
+testmetric1_1{foo="bar"} 10
+# HELP testmetric1_2 Metric read from collector/fixtures/textfile/two_metric_files/metrics1.prom
+# TYPE testmetric1_2 untyped
+testmetric1_2{foo="baz"} 20
+# HELP testmetric2_1 Metric read from collector/fixtures/textfile/two_metric_files/metrics2.prom
+# TYPE testmetric2_1 untyped
+testmetric2_1{foo="bar"} 30
+# HELP testmetric2_2 Metric read from collector/fixtures/textfile/two_metric_files/metrics2.prom
+# TYPE testmetric2_2 untyped
+testmetric2_2{foo="baz"} 40
diff --git a/collector/fixtures/e2e-output-dragonfly.txt b/collector/fixtures/e2e-output-dragonfly.txt
index 43de1b44d2..aef68e2a20 100644
--- a/collector/fixtures/e2e-output-dragonfly.txt
+++ b/collector/fixtures/e2e-output-dragonfly.txt
@@ -101,9 +101,6 @@ node_network_receive_drop_total{device="lo0"} 0
 # HELP node_network_receive_errs_total Network device statistic receive_errs.
 # TYPE node_network_receive_errs_total counter
 node_network_receive_errs_total{device="lo0"} 0
-# HELP node_network_receive_multicast_total Network device statistic receive_multicast.
-# TYPE node_network_receive_multicast_total counter
-node_network_receive_multicast_total{device="lo0"} 0
 # HELP node_network_receive_packets_total Network device statistic receive_packets.
 # TYPE node_network_receive_packets_total counter
 # HELP node_network_transmit_bytes_total Network device statistic transmit_bytes.
diff --git a/collector/fixtures/e2e-output-freebsd.txt b/collector/fixtures/e2e-output-freebsd.txt
index 400397f83e..82b388b545 100644
--- a/collector/fixtures/e2e-output-freebsd.txt
+++ b/collector/fixtures/e2e-output-freebsd.txt
@@ -93,9 +93,6 @@ node_buddyinfo_blocks{node="0",size="9",zone="DMA32"} 0
 node_buddyinfo_blocks{node="0",size="9",zone="Normal"} 0
 # HELP node_exporter_build_info A metric with a constant '1' value labeled by version, revision, branch, goversion from which node_exporter was built, and the goos and goarch for the build.
 # TYPE node_exporter_build_info gauge
-# HELP node_memory_size_bytes Total physical memory size
-# TYPE node_memory_size_bytes gauge
-node_memory_size_bytes 6.214455296e+09
 # HELP node_memory_swap_in_bytes_total Bytes paged in from swap devices
 # TYPE node_memory_swap_in_bytes_total counter
 node_memory_swap_in_bytes_total 0
@@ -137,9 +134,6 @@ node_network_receive_drop_total{device="lo0"} 0
 # HELP node_network_receive_errs_total Network device statistic receive_errs.
 # TYPE node_network_receive_errs_total counter
 node_network_receive_errs_total{device="lo0"} 0
-# HELP node_network_receive_multicast_total Network device statistic receive_multicast.
-# TYPE node_network_receive_multicast_total counter
-node_network_receive_multicast_total{device="lo0"} 0
 # HELP node_network_receive_packets_total Network device statistic receive_packets.
 # TYPE node_network_receive_packets_total counter
 # HELP node_network_transmit_bytes_total Network device statistic transmit_bytes.
diff --git a/collector/fixtures/e2e-output-netbsd.txt b/collector/fixtures/e2e-output-netbsd.txt
index 7f9c28a629..1a6f140221 100644
--- a/collector/fixtures/e2e-output-netbsd.txt
+++ b/collector/fixtures/e2e-output-netbsd.txt
@@ -58,9 +58,6 @@
 # TYPE go_threads gauge
 # HELP node_exporter_build_info A metric with a constant '1' value labeled by version, revision, branch, goversion from which node_exporter was built, and the goos and goarch for the build.
 # TYPE node_exporter_build_info gauge
-# HELP node_memory_size_bytes Memory information field size_bytes.
-# TYPE node_memory_size_bytes gauge
-node_memory_size_bytes 6.218080256e+09
 # HELP node_memory_swap_size_bytes Memory information field swap_size_bytes.
 # TYPE node_memory_swap_size_bytes gauge
 node_memory_swap_size_bytes 6.442426368e+09
diff --git a/collector/fixtures/e2e-output-openbsd.txt b/collector/fixtures/e2e-output-openbsd.txt
index 227b67f9c4..1afdad5970 100644
--- a/collector/fixtures/e2e-output-openbsd.txt
+++ b/collector/fixtures/e2e-output-openbsd.txt
@@ -93,9 +93,6 @@ node_buddyinfo_blocks{node="0",size="9",zone="DMA32"} 0
 node_buddyinfo_blocks{node="0",size="9",zone="Normal"} 0
 # HELP node_exporter_build_info A metric with a constant '1' value labeled by version, revision, branch, goversion from which node_exporter was built, and the goos and goarch for the build.
 # TYPE node_exporter_build_info gauge
-# HELP node_memory_size_bytes Memory information field size_bytes.
-# TYPE node_memory_size_bytes gauge
-node_memory_size_bytes 6.216278016e+09
 # HELP node_memory_swap_size_bytes Memory information field swap_size_bytes.
 # TYPE node_memory_swap_size_bytes gauge
 node_memory_swap_size_bytes 6.693941248e+09
@@ -122,10 +119,6 @@ node_network_receive_drop_total{device="pflog0"} 0
 # TYPE node_network_receive_errs_total counter
 node_network_receive_errs_total{device="lo0"} 0
 node_network_receive_errs_total{device="pflog0"} 0
-# HELP node_network_receive_multicast_total Network device statistic receive_multicast.
-# TYPE node_network_receive_multicast_total counter
-node_network_receive_multicast_total{device="lo0"} 0
-node_network_receive_multicast_total{device="pflog0"} 0
 # HELP node_network_receive_packets_total Network device statistic receive_packets.
 # TYPE node_network_receive_packets_total counter
 # HELP node_network_transmit_bytes_total Network device statistic transmit_bytes.
diff --git a/collector/fixtures/e2e-output-solaris.txt b/collector/fixtures/e2e-output-solaris.txt
new file mode 100644
index 0000000000..2f39a5f6a2
--- /dev/null
+++ b/collector/fixtures/e2e-output-solaris.txt
@@ -0,0 +1,240 @@
+# HELP go_gc_duration_seconds A summary of the wall-time pause (stop-the-world) duration in garbage collection cycles.
+# TYPE go_gc_duration_seconds summary
+# HELP go_gc_gogc_percent Heap size target percentage configured by the user, otherwise 100. This value is set by the GOGC environment variable, and the runtime/debug.SetGCPercent function. Sourced from /gc/gogc:percent
+# TYPE go_gc_gogc_percent gauge
+# HELP go_gc_gomemlimit_bytes Go runtime memory limit configured by the user, otherwise math.MaxInt64. This value is set by the GOMEMLIMIT environment variable, and the runtime/debug.SetMemoryLimit function. Sourced from /gc/gomemlimit:bytes
+# TYPE go_gc_gomemlimit_bytes gauge
+# HELP go_goroutines Number of goroutines that currently exist.
+# TYPE go_goroutines gauge
+# HELP go_info Information about the Go environment.
+# TYPE go_info gauge
+# HELP go_memstats_alloc_bytes Number of bytes allocated in heap and currently in use. Equals to /memory/classes/heap/objects:bytes.
+# TYPE go_memstats_alloc_bytes gauge
+# HELP go_memstats_alloc_bytes_total Total number of bytes allocated in heap until now, even if released already. Equals to /gc/heap/allocs:bytes.
+# TYPE go_memstats_alloc_bytes_total counter
+# HELP go_memstats_buck_hash_sys_bytes Number of bytes used by the profiling bucket hash table. Equals to /memory/classes/profiling/buckets:bytes.
+# TYPE go_memstats_buck_hash_sys_bytes gauge
+# HELP go_memstats_frees_total Total number of heap objects frees. Equals to /gc/heap/frees:objects + /gc/heap/tiny/allocs:objects.
+# TYPE go_memstats_frees_total counter
+# HELP go_memstats_gc_sys_bytes Number of bytes used for garbage collection system metadata. Equals to /memory/classes/metadata/other:bytes.
+# TYPE go_memstats_gc_sys_bytes gauge
+# HELP go_memstats_heap_alloc_bytes Number of heap bytes allocated and currently in use, same as go_memstats_alloc_bytes. Equals to /memory/classes/heap/objects:bytes.
+# TYPE go_memstats_heap_alloc_bytes gauge
+# HELP go_memstats_heap_idle_bytes Number of heap bytes waiting to be used. Equals to /memory/classes/heap/released:bytes + /memory/classes/heap/free:bytes.
+# TYPE go_memstats_heap_idle_bytes gauge
+# HELP go_memstats_heap_inuse_bytes Number of heap bytes that are in use. Equals to /memory/classes/heap/objects:bytes + /memory/classes/heap/unused:bytes
+# TYPE go_memstats_heap_inuse_bytes gauge
+# HELP go_memstats_heap_objects Number of currently allocated objects. Equals to /gc/heap/objects:objects.
+# TYPE go_memstats_heap_objects gauge
+# HELP go_memstats_heap_released_bytes Number of heap bytes released to OS. Equals to /memory/classes/heap/released:bytes.
+# TYPE go_memstats_heap_released_bytes gauge
+# HELP go_memstats_heap_sys_bytes Number of heap bytes obtained from system. Equals to /memory/classes/heap/objects:bytes + /memory/classes/heap/unused:bytes + /memory/classes/heap/released:bytes + /memory/classes/heap/free:bytes.
+# TYPE go_memstats_heap_sys_bytes gauge
+# HELP go_memstats_last_gc_time_seconds Number of seconds since 1970 of last garbage collection.
+# TYPE go_memstats_last_gc_time_seconds gauge
+# HELP go_memstats_mallocs_total Total number of heap objects allocated, both live and gc-ed. Semantically a counter version for go_memstats_heap_objects gauge. Equals to /gc/heap/allocs:objects + /gc/heap/tiny/allocs:objects.
+# TYPE go_memstats_mallocs_total counter
+# HELP go_memstats_mcache_inuse_bytes Number of bytes in use by mcache structures. Equals to /memory/classes/metadata/mcache/inuse:bytes.
+# TYPE go_memstats_mcache_inuse_bytes gauge
+# HELP go_memstats_mcache_sys_bytes Number of bytes used for mcache structures obtained from system. Equals to /memory/classes/metadata/mcache/inuse:bytes + /memory/classes/metadata/mcache/free:bytes.
+# TYPE go_memstats_mcache_sys_bytes gauge
+# HELP go_memstats_mspan_inuse_bytes Number of bytes in use by mspan structures. Equals to /memory/classes/metadata/mspan/inuse:bytes.
+# TYPE go_memstats_mspan_inuse_bytes gauge
+# HELP go_memstats_mspan_sys_bytes Number of bytes used for mspan structures obtained from system. Equals to /memory/classes/metadata/mspan/inuse:bytes + /memory/classes/metadata/mspan/free:bytes.
+# TYPE go_memstats_mspan_sys_bytes gauge
+# HELP go_memstats_next_gc_bytes Number of heap bytes when next garbage collection will take place. Equals to /gc/heap/goal:bytes.
+# TYPE go_memstats_next_gc_bytes gauge
+# HELP go_memstats_other_sys_bytes Number of bytes used for other system allocations. Equals to /memory/classes/other:bytes.
+# TYPE go_memstats_other_sys_bytes gauge
+# HELP go_memstats_stack_inuse_bytes Number of bytes obtained from system for stack allocator in non-CGO environments. Equals to /memory/classes/heap/stacks:bytes.
+# TYPE go_memstats_stack_inuse_bytes gauge
+# HELP go_memstats_stack_sys_bytes Number of bytes obtained from system for stack allocator. Equals to /memory/classes/heap/stacks:bytes + /memory/classes/os-stacks:bytes.
+# TYPE go_memstats_stack_sys_bytes gauge
+# HELP go_memstats_sys_bytes Number of bytes obtained from system. Equals to /memory/classes/total:byte.
+# TYPE go_memstats_sys_bytes gauge
+# HELP go_sched_gomaxprocs_threads The current runtime.GOMAXPROCS setting, or the number of operating system threads that can execute user-level Go code simultaneously. Sourced from /sched/gomaxprocs:threads
+# TYPE go_sched_gomaxprocs_threads gauge
+# HELP go_threads Number of OS threads created.
+# TYPE go_threads gauge
+# HELP node_buddyinfo_blocks Count of free blocks according to size.
+# TYPE node_buddyinfo_blocks gauge
+node_buddyinfo_blocks{node="0",size="0",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="0",zone="DMA32"} 759
+node_buddyinfo_blocks{node="0",size="0",zone="Normal"} 4381
+node_buddyinfo_blocks{node="0",size="1",zone="DMA"} 0
+node_buddyinfo_blocks{node="0",size="1",zone="DMA32"} 572
+node_buddyinfo_blocks{node="0",size="1",zone="Normal"} 1093
+node_buddyinfo_blocks{node="0",size="10",zone="DMA"} 3
+node_buddyinfo_blocks{node="0",size="10",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="10",zone="Normal"} 0
+node_buddyinfo_blocks{node="0",size="2",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="2",zone="DMA32"} 791
+node_buddyinfo_blocks{node="0",size="2",zone="Normal"} 185
+node_buddyinfo_blocks{node="0",size="3",zone="DMA"} 0
+node_buddyinfo_blocks{node="0",size="3",zone="DMA32"} 475
+node_buddyinfo_blocks{node="0",size="3",zone="Normal"} 1530
+node_buddyinfo_blocks{node="0",size="4",zone="DMA"} 2
+node_buddyinfo_blocks{node="0",size="4",zone="DMA32"} 194
+node_buddyinfo_blocks{node="0",size="4",zone="Normal"} 567
+node_buddyinfo_blocks{node="0",size="5",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="5",zone="DMA32"} 45
+node_buddyinfo_blocks{node="0",size="5",zone="Normal"} 102
+node_buddyinfo_blocks{node="0",size="6",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="6",zone="DMA32"} 12
+node_buddyinfo_blocks{node="0",size="6",zone="Normal"} 4
+node_buddyinfo_blocks{node="0",size="7",zone="DMA"} 0
+node_buddyinfo_blocks{node="0",size="7",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="7",zone="Normal"} 0
+node_buddyinfo_blocks{node="0",size="8",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="8",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="8",zone="Normal"} 0
+node_buddyinfo_blocks{node="0",size="9",zone="DMA"} 1
+node_buddyinfo_blocks{node="0",size="9",zone="DMA32"} 0
+node_buddyinfo_blocks{node="0",size="9",zone="Normal"} 0
+# HELP node_cpu_frequency_max_hertz Maximum CPU thread frequency in hertz.
+# TYPE node_cpu_frequency_max_hertz gauge
+node_cpu_frequency_max_hertz{cpu="0"} 2.445e+09
+node_cpu_frequency_max_hertz{cpu="1"} 2.445e+09
+node_cpu_frequency_max_hertz{cpu="2"} 2.445e+09
+node_cpu_frequency_max_hertz{cpu="3"} 2.445e+09
+# HELP node_exporter_build_info A metric with a constant '1' value labeled by version, revision, branch, goversion from which node_exporter was built, and the goos and goarch for the build.
+# TYPE node_exporter_build_info gauge
+# HELP node_os_info A metric with a constant '1' value labeled by build_id, id, id_like, image_id, image_version, name, pretty_name, variant, variant_id, version, version_codename, version_id.
+# TYPE node_os_info gauge
+node_os_info{build_id="",id="ubuntu",id_like="debian",image_id="",image_version="",name="Ubuntu",pretty_name="Ubuntu 20.04.2 LTS",variant="",variant_id="",version="20.04.2 LTS (Focal Fossa)",version_codename="focal",version_id="20.04"} 1
+# HELP node_os_version Metric containing the major.minor part of the OS version.
+# TYPE node_os_version gauge
+node_os_version{id="ubuntu",id_like="debian",name="Ubuntu"} 20.04
+# HELP node_scrape_collector_duration_seconds node_exporter: Duration of a collector scrape.
+# TYPE node_scrape_collector_duration_seconds gauge
+# HELP node_scrape_collector_success node_exporter: Whether a collector succeeded.
+# TYPE node_scrape_collector_success gauge
+node_scrape_collector_success{collector="boottime"} 1
+node_scrape_collector_success{collector="buddyinfo"} 1
+node_scrape_collector_success{collector="cpu"} 0
+node_scrape_collector_success{collector="cpufreq"} 1
+node_scrape_collector_success{collector="loadavg"} 1
+node_scrape_collector_success{collector="os"} 1
+node_scrape_collector_success{collector="textfile"} 1
+node_scrape_collector_success{collector="time"} 1
+node_scrape_collector_success{collector="xfrm"} 1
+node_scrape_collector_success{collector="zfs"} 0
+# HELP node_textfile_mtime_seconds Unixtime mtime of textfiles successfully read.
+# TYPE node_textfile_mtime_seconds gauge
+# HELP node_textfile_scrape_error 1 if there was an error opening or reading a file, 0 otherwise
+# TYPE node_textfile_scrape_error gauge
+node_textfile_scrape_error 0
+# HELP node_time_seconds System time in seconds since epoch (1970).
+# TYPE node_time_seconds gauge
+# HELP node_time_zone_offset_seconds System time zone offset in seconds.
+# TYPE node_time_zone_offset_seconds gauge
+# HELP node_xfrm_acquire_error_packets_total State hasn’t been fully acquired before use
+# TYPE node_xfrm_acquire_error_packets_total counter
+node_xfrm_acquire_error_packets_total 24532
+# HELP node_xfrm_fwd_hdr_error_packets_total Forward routing of a packet is not allowed
+# TYPE node_xfrm_fwd_hdr_error_packets_total counter
+node_xfrm_fwd_hdr_error_packets_total 6654
+# HELP node_xfrm_in_buffer_error_packets_total No buffer is left
+# TYPE node_xfrm_in_buffer_error_packets_total counter
+node_xfrm_in_buffer_error_packets_total 2
+# HELP node_xfrm_in_error_packets_total All errors not matched by other
+# TYPE node_xfrm_in_error_packets_total counter
+node_xfrm_in_error_packets_total 1
+# HELP node_xfrm_in_hdr_error_packets_total Header error
+# TYPE node_xfrm_in_hdr_error_packets_total counter
+node_xfrm_in_hdr_error_packets_total 4
+# HELP node_xfrm_in_no_pols_packets_total No policy is found for states e.g. Inbound SAs are correct but no SP is found
+# TYPE node_xfrm_in_no_pols_packets_total counter
+node_xfrm_in_no_pols_packets_total 65432
+# HELP node_xfrm_in_no_states_packets_total No state is found i.e. Either inbound SPI, address, or IPsec protocol at SA is wrong
+# TYPE node_xfrm_in_no_states_packets_total counter
+node_xfrm_in_no_states_packets_total 3
+# HELP node_xfrm_in_pol_block_packets_total Policy discards
+# TYPE node_xfrm_in_pol_block_packets_total counter
+node_xfrm_in_pol_block_packets_total 100
+# HELP node_xfrm_in_pol_error_packets_total Policy error
+# TYPE node_xfrm_in_pol_error_packets_total counter
+node_xfrm_in_pol_error_packets_total 10000
+# HELP node_xfrm_in_state_expired_packets_total State is expired
+# TYPE node_xfrm_in_state_expired_packets_total counter
+node_xfrm_in_state_expired_packets_total 7
+# HELP node_xfrm_in_state_invalid_packets_total State is invalid
+# TYPE node_xfrm_in_state_invalid_packets_total counter
+node_xfrm_in_state_invalid_packets_total 55555
+# HELP node_xfrm_in_state_mismatch_packets_total State has mismatch option e.g. UDP encapsulation type is mismatch
+# TYPE node_xfrm_in_state_mismatch_packets_total counter
+node_xfrm_in_state_mismatch_packets_total 23451
+# HELP node_xfrm_in_state_mode_error_packets_total Transformation mode specific error
+# TYPE node_xfrm_in_state_mode_error_packets_total counter
+node_xfrm_in_state_mode_error_packets_total 100
+# HELP node_xfrm_in_state_proto_error_packets_total Transformation protocol specific error e.g. SA key is wrong
+# TYPE node_xfrm_in_state_proto_error_packets_total counter
+node_xfrm_in_state_proto_error_packets_total 40
+# HELP node_xfrm_in_state_seq_error_packets_total Sequence error i.e. Sequence number is out of window
+# TYPE node_xfrm_in_state_seq_error_packets_total counter
+node_xfrm_in_state_seq_error_packets_total 6000
+# HELP node_xfrm_in_tmpl_mismatch_packets_total No matching template for states e.g. Inbound SAs are correct but SP rule is wrong
+# TYPE node_xfrm_in_tmpl_mismatch_packets_total counter
+node_xfrm_in_tmpl_mismatch_packets_total 51
+# HELP node_xfrm_out_bundle_check_error_packets_total Bundle check error
+# TYPE node_xfrm_out_bundle_check_error_packets_total counter
+node_xfrm_out_bundle_check_error_packets_total 555
+# HELP node_xfrm_out_bundle_gen_error_packets_total Bundle generation error
+# TYPE node_xfrm_out_bundle_gen_error_packets_total counter
+node_xfrm_out_bundle_gen_error_packets_total 43321
+# HELP node_xfrm_out_error_packets_total All errors which is not matched others
+# TYPE node_xfrm_out_error_packets_total counter
+node_xfrm_out_error_packets_total 1e+06
+# HELP node_xfrm_out_no_states_packets_total No state is found
+# TYPE node_xfrm_out_no_states_packets_total counter
+node_xfrm_out_no_states_packets_total 869
+# HELP node_xfrm_out_pol_block_packets_total Policy discards
+# TYPE node_xfrm_out_pol_block_packets_total counter
+node_xfrm_out_pol_block_packets_total 43456
+# HELP node_xfrm_out_pol_dead_packets_total Policy is dead
+# TYPE node_xfrm_out_pol_dead_packets_total counter
+node_xfrm_out_pol_dead_packets_total 7656
+# HELP node_xfrm_out_pol_error_packets_total Policy error
+# TYPE node_xfrm_out_pol_error_packets_total counter
+node_xfrm_out_pol_error_packets_total 1454
+# HELP node_xfrm_out_state_expired_packets_total State is expired
+# TYPE node_xfrm_out_state_expired_packets_total counter
+node_xfrm_out_state_expired_packets_total 565
+# HELP node_xfrm_out_state_invalid_packets_total State is invalid, perhaps expired
+# TYPE node_xfrm_out_state_invalid_packets_total counter
+node_xfrm_out_state_invalid_packets_total 28765
+# HELP node_xfrm_out_state_mode_error_packets_total Transformation mode specific error
+# TYPE node_xfrm_out_state_mode_error_packets_total counter
+node_xfrm_out_state_mode_error_packets_total 8
+# HELP node_xfrm_out_state_proto_error_packets_total Transformation protocol specific error
+# TYPE node_xfrm_out_state_proto_error_packets_total counter
+node_xfrm_out_state_proto_error_packets_total 4542
+# HELP node_xfrm_out_state_seq_error_packets_total Sequence error i.e. Sequence number overflow
+# TYPE node_xfrm_out_state_seq_error_packets_total counter
+node_xfrm_out_state_seq_error_packets_total 543
+# HELP process_open_fds Number of open file descriptors.
+# TYPE process_open_fds gauge
+# HELP promhttp_metric_handler_errors_total Total number of internal errors encountered by the promhttp metric handler.
+# TYPE promhttp_metric_handler_errors_total counter
+promhttp_metric_handler_errors_total{cause="encoding"} 0
+promhttp_metric_handler_errors_total{cause="gathering"} 0
+# HELP promhttp_metric_handler_requests_in_flight Current number of scrapes being served.
+# TYPE promhttp_metric_handler_requests_in_flight gauge
+promhttp_metric_handler_requests_in_flight 1
+# HELP promhttp_metric_handler_requests_total Total number of scrapes by HTTP status code.
+# TYPE promhttp_metric_handler_requests_total counter
+promhttp_metric_handler_requests_total{code="200"} 0
+promhttp_metric_handler_requests_total{code="500"} 0
+promhttp_metric_handler_requests_total{code="503"} 0
+# HELP testmetric1_1 Metric read from collector/fixtures/textfile/two_metric_files/metrics1.prom
+# TYPE testmetric1_1 untyped
+testmetric1_1{foo="bar"} 10
+# HELP testmetric1_2 Metric read from collector/fixtures/textfile/two_metric_files/metrics1.prom
+# TYPE testmetric1_2 untyped
+testmetric1_2{foo="baz"} 20
+# HELP testmetric2_1 Metric read from collector/fixtures/textfile/two_metric_files/metrics2.prom
+# TYPE testmetric2_1 untyped
+testmetric2_1{foo="bar"} 30
+# HELP testmetric2_2 Metric read from collector/fixtures/textfile/two_metric_files/metrics2.prom
+# TYPE testmetric2_2 untyped
+testmetric2_2{foo="baz"} 40
diff --git a/end-to-end-test.sh b/end-to-end-test.sh
index 8e9dfc18a5..04cab1d8ac 100755
--- a/end-to-end-test.sh
+++ b/end-to-end-test.sh
@@ -269,7 +269,7 @@ echo "========================="
 echo $! > "${tmpdir}/node_exporter.pid"
 
 generated_metrics="${tmpdir}/e2e-output.txt"
-for os in freebsd openbsd netbsd solaris dragonfly; do
+for os in freebsd openbsd netbsd solaris dragonfly darwin; do
   if [ "${GOHOSTOS}" = "${os}" ]; then
     generated_metrics="${tmpdir}/e2e-output-${GOHOSTOS}.txt"
     fixture_metrics="${fixture_metrics::-4}-${GOHOSTOS}.txt"
@@ -322,35 +322,47 @@ get "127.0.0.1:${port}/metrics" | grep --text -E -v "${skip_re}" > "${generated_
 
 non_deterministic_metrics=$(cat << METRICS
   node_boot_time_seconds
+  node_cpu_frequency_hertz
   node_cpu_seconds_total
+  node_disk_io_time_seconds_total
+  node_disk_read_bytes_total
+  node_disk_read_sectors_total
+  node_disk_read_time_seconds_total
+  node_disk_reads_completed_total
+  node_disk_write_time_seconds_total
+  node_disk_writes_completed_total
+  node_disk_written_bytes_total
+  node_disk_written_sectors_total
   node_exec_context_switches_total
   node_exec_device_interrupts_total
-  node_exec_software_interrupts_total
-  node_network_transmit_multicast_total
   node_exec_forks_total
+  node_exec_software_interrupts_total
   node_exec_system_calls_total
   node_exec_traps_total
+  node_interrupts_total
   node_load1
   node_load15
   node_load5
   node_memory_active_bytes
   node_memory_buffer_bytes
+  node_memory_cache_bytes
+  node_memory_compressed_bytes
   node_memory_free_bytes
   node_memory_inactive_bytes
+  node_memory_internal_bytes
   node_memory_laundry_bytes
+  node_memory_purgeable_bytes
+  node_memory_size_bytes
+  node_memory_swapped_in_bytes_total
+  node_memory_swapped_out_bytes_total
   node_memory_wired_bytes
-  node_interrupts_total
-  node_disk_written_bytes_total
-  node_disk_writes_completed_total
-  node_disk_reads_completed_total
-  node_disk_read_bytes_total
-  node_disk_io_time_seconds_total
-  node_memory_cache_bytes
+  node_network_receive_multicast_total
+  node_network_transmit_multicast_total
 METRICS
 )
 
 # Remove non-deterministic metrics from the generated metrics file (as we run their workflows in VMs).
-for os in freebsd openbsd netbsd solaris dragonfly; do
+for os in freebsd openbsd netbsd solaris dragonfly darwin; do
   if [ "${GOHOSTOS}" = "${os}" ]; then
     for metric in ${non_deterministic_metrics}; do
       sed -i "/${metric}/d" "${generated_metrics}"