diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index dc27c93c884436..e1b75d3b439aea 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -196,7 +196,9 @@ jobs:
             - name: Run Tests
               timeout-minutes: 65
               run: |
-                  test -z ${BUILD_VARIANT##*tsan*} && export LD_LIBRARY_PATH=$LD_LIBRARY_PATH_TSAN
+                  echo ${BUILD_VARIANT} | grep -q tsan && export LD_LIBRARY_PATH=$LD_LIBRARY_PATH_TSAN
+                  echo $LD_LIBRARY_PATH
+                  ls -l $LD_LIBRARY_PATH
                   ./scripts/run_in_build_env.sh \
                   "./scripts/tests/run_test_suite.py \
                      --chip-tool ./out/linux-x64-chip-tool${CHIP_TOOL_VARIANT}-${BUILD_VARIANT}/chip-tool \
@@ -396,7 +398,7 @@ jobs:
             - name: Run Tests
               timeout-minutes: 10
               run: |
-                  test -z ${BUILD_VARIANT##*tsan*} && export LD_LIBRARY_PATH=$LD_LIBRARY_PATH_TSAN
+                  echo ${BUILD_VARIANT} | grep -q tsan && export LD_LIBRARY_PATH=$LD_LIBRARY_PATH_TSAN
                   ./scripts/run_in_build_env.sh \
                      "./scripts/tests/run_python_test.py \
                         --app out/linux-x64-all-clusters-${BUILD_VARIANT}-test/chip-all-clusters-app \