diff --git a/.github/workflows/master_ci.yml b/.github/workflows/master_ci.yml
index cb69c3e55..0812888c5 100644
--- a/.github/workflows/master_ci.yml
+++ b/.github/workflows/master_ci.yml
@@ -80,11 +80,7 @@ jobs:
 
   mt_kahypar_test_suite:
     name: Test Suite
-    strategy:
-      matrix:
-        compiler: [ { os: ubuntu-24.04, cpp: g++-14, cc: gcc-14, install_cmd: g++-14 gcc-14 },
-                    { os: ubuntu-22.04, cpp: g++-11, cc: gcc-11, install_cmd: g++-11 gcc-11 } ]
-    runs-on: ${{ matrix.compiler.os }}
+    runs-on: ubuntu-22.04  # note: stay on 22.04 since lcov behaves weird on 24.04
     env:
       CI_ACTIVE : 1
 
@@ -97,9 +93,6 @@ jobs:
           sudo apt-get install libtbb-dev libhwloc-dev libboost-program-options-dev lcov gcovr
 
       - name: Install Mt-KaHyPar Test Suite
-        env:
-          CC: ${{ matrix.compiler.cc }}
-          CXX: ${{ matrix.compiler.cpp }}
         run: |
           rm -rf build
           mkdir build