diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b89f400a16f3..a8d91ec99238 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -210,12 +210,12 @@ codecov:
   variables:
     # For codecov it's sufficient to run the fuzz tests only once.
     QUICKCHECK_TESTS: 1
-    CARGO_INCREMENTAL: 0
+    # CARGO_INCREMENTAL: 0
     # Needed because `codecov` requires nightly features to work
     # (see `-Z` in the `RUSTFLAGS` below).
-    RUSTC_BOOTSTRAP: "1"
+    # RUSTC_BOOTSTRAP: "1"
     # Variables partly came from https://github.com/mozilla/grcov/blob/master/README.md
-    RUSTFLAGS: "-Zprofile -Zmir-opt-level=0 -Ccodegen-units=1 -Clink-dead-code -Copt-level=0 -Coverflow-checks=off"
+    # RUSTFLAGS: "-Zprofile -Zmir-opt-level=0 -Ccodegen-units=1 -Clink-dead-code -Copt-level=0 -Coverflow-checks=off"
     RUSTDOCFLAGS: "-Cpanic=abort"
     # The `cargo-taurpalin` coverage reporting tool seems to have better code instrumentation and thus
     # produces better results for Rust codebases in general. However, unlike `grcov` it requires
@@ -228,6 +228,7 @@ codecov:
       --locked
       --release
       --no-fail-fast
+      --partition count:1/5
       --features try-runtime,experimental > /dev/null || echo "some errors"
     - mkdir -p target/coverage
     - grcov . --binary-path ./target/release/deps/ -s . -t lcov --branch --ignore-not-existing --ignore '../*' --ignore "/*" -o target/coverage/tests.lcov