diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fe7ee9b1..d532721c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -82,7 +82,7 @@ jobs:
       run: "LAZE=$(pwd)/target/debug/laze make -C src/tests"
 
     - name: "collect coverage results"
-      if: ${{ matrix.toolchain == 'nightly' }}
+      if: ${{ startsWith(matrix.toolchain, 'nightly') }}
       run: >
        RUSTUP_TOOLCHAIN=${{ matrix.toolchain }}
        grcov
@@ -95,7 +95,7 @@ jobs:
        --ignore "/*"
 
     - name: Coveralls
-      if: ${{ matrix.toolchain == 'nightly' }}
+      if: ${{ startsWith(matrix.toolchain, 'nightly') }}
       uses: coverallsapp/github-action@v1
       with:
         path-to-lcov: "lcov.info"