diff --git a/cmd/ceems_tool/testdata/output/e2e-test-web-config-output.txt b/cmd/ceems_tool/testdata/output/e2e-test-web-config-output.txt
index 436de4a..1d0bf76 100644
--- a/cmd/ceems_tool/testdata/output/e2e-test-web-config-output.txt
+++ b/cmd/ceems_tool/testdata/output/e2e-test-web-config-output.txt
@@ -1,46 +1,46 @@
 # HELP ceems_cpu_count Number of CPUs.
 # TYPE ceems_cpu_count gauge
-ceems_cpu_count{hostname="HPORT22-MPa"} 8
+ceems_cpu_count{hostname=""} 8
 # HELP ceems_cpu_per_core_count Number of logical CPUs per physical core.
 # TYPE ceems_cpu_per_core_count gauge
-ceems_cpu_per_core_count{hostname="HPORT22-MPa"} 2
+ceems_cpu_per_core_count{hostname=""} 2
 # HELP ceems_cpu_seconds_total Seconds the CPUs spent in each mode.
 # TYPE ceems_cpu_seconds_total counter
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="idle"} 89790.04
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="iowait"} 35.52
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="irq"} 0.02
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="nice"} 6.12
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="softirq"} 39.44
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="steal"} 0
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="system"} 1119.22
-ceems_cpu_seconds_total{hostname="HPORT22-MPa",mode="user"} 3018.54
+ceems_cpu_seconds_total{hostname="",mode="idle"} 89790.04
+ceems_cpu_seconds_total{hostname="",mode="iowait"} 35.52
+ceems_cpu_seconds_total{hostname="",mode="irq"} 0.02
+ceems_cpu_seconds_total{hostname="",mode="nice"} 6.12
+ceems_cpu_seconds_total{hostname="",mode="softirq"} 39.44
+ceems_cpu_seconds_total{hostname="",mode="steal"} 0
+ceems_cpu_seconds_total{hostname="",mode="system"} 1119.22
+ceems_cpu_seconds_total{hostname="",mode="user"} 3018.54
 # HELP ceems_exporter_build_info A metric with a constant '1' value labeled by version, revision, branch, goversion from which ceems_exporter was built, and the goos and goarch for the build.
 # TYPE ceems_exporter_build_info gauge
 # HELP ceems_meminfo_MemAvailable_bytes Memory information field MemAvailable_bytes.
 # TYPE ceems_meminfo_MemAvailable_bytes gauge
-ceems_meminfo_MemAvailable_bytes{hostname="HPORT22-MPa"} 0
+ceems_meminfo_MemAvailable_bytes{hostname=""} 0
 # HELP ceems_meminfo_MemFree_bytes Memory information field MemFree_bytes.
 # TYPE ceems_meminfo_MemFree_bytes gauge
-ceems_meminfo_MemFree_bytes{hostname="HPORT22-MPa"} 4.50891776e+08
+ceems_meminfo_MemFree_bytes{hostname=""} 4.50891776e+08
 # HELP ceems_meminfo_MemTotal_bytes Memory information field MemTotal_bytes.
 # TYPE ceems_meminfo_MemTotal_bytes gauge
-ceems_meminfo_MemTotal_bytes{hostname="HPORT22-MPa"} 1.6042172416e+10
+ceems_meminfo_MemTotal_bytes{hostname=""} 1.6042172416e+10
 # HELP ceems_rapl_dram_joules_total Current RAPL dram value in joules
 # TYPE ceems_rapl_dram_joules_total counter
-ceems_rapl_dram_joules_total{hostname="HPORT22-MPa",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0:0"} 24468.409791
-ceems_rapl_dram_joules_total{hostname="HPORT22-MPa",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1:0"} 64930.394974
+ceems_rapl_dram_joules_total{hostname="",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0:0"} 24468.409791
+ceems_rapl_dram_joules_total{hostname="",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1:0"} 64930.394974
 # HELP ceems_rapl_dram_power_limit_watts_total Current RAPL dram power limit in watts
 # TYPE ceems_rapl_dram_power_limit_watts_total counter
-ceems_rapl_dram_power_limit_watts_total{hostname="HPORT22-MPa",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0:0"} 0
-ceems_rapl_dram_power_limit_watts_total{hostname="HPORT22-MPa",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1:0"} 0
+ceems_rapl_dram_power_limit_watts_total{hostname="",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0:0"} 0
+ceems_rapl_dram_power_limit_watts_total{hostname="",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1:0"} 0
 # HELP ceems_rapl_package_joules_total Current RAPL package value in joules
 # TYPE ceems_rapl_package_joules_total counter
-ceems_rapl_package_joules_total{hostname="HPORT22-MPa",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0"} 258218.293244
-ceems_rapl_package_joules_total{hostname="HPORT22-MPa",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1"} 130570.505826
+ceems_rapl_package_joules_total{hostname="",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0"} 258218.293244
+ceems_rapl_package_joules_total{hostname="",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1"} 130570.505826
 # HELP ceems_rapl_package_power_limit_watts_total Current RAPL package power limit in watts
 # TYPE ceems_rapl_package_power_limit_watts_total counter
-ceems_rapl_package_power_limit_watts_total{hostname="HPORT22-MPa",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0"} 180
-ceems_rapl_package_power_limit_watts_total{hostname="HPORT22-MPa",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1"} 180
+ceems_rapl_package_power_limit_watts_total{hostname="",index="0",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:0"} 180
+ceems_rapl_package_power_limit_watts_total{hostname="",index="1",path="pkg/collector/testdata/sys/class/powercap/intel-rapl:1"} 180
 # HELP ceems_scrape_collector_duration_seconds ceems_exporter: Duration of a collector scrape.
 # TYPE ceems_scrape_collector_duration_seconds gauge
 # HELP ceems_scrape_collector_success ceems_exporter: Whether a collector succeeded.
diff --git a/scripts/e2e-test.sh b/scripts/e2e-test.sh
index 10a1da9..0457b9a 100755
--- a/scripts/e2e-test.sh
+++ b/scripts/e2e-test.sh
@@ -1456,6 +1456,7 @@ then
         --web.listen-address "127.0.0.1:${port}" \
         --web.config.file="${tmpdir}/config/web-config.yml" \
         --web.disable-exporter-metrics \
+        --collector.empty-hostname-label \
         --log.level="debug" >> "${logfile}" 2>&1 &
       EXPORTER_PID=$!