diff --git a/.github/workflows/test-ui-gh_runner.yml b/.github/workflows/test-ui-gh_runner.yml
index cfd48ee9173..0a59bcbff46 100644
--- a/.github/workflows/test-ui-gh_runner.yml
+++ b/.github/workflows/test-ui-gh_runner.yml
@@ -154,7 +154,11 @@ jobs:
         if: steps.check.outputs.runtests
         shell: "bash"
         run: |
-          export CLASSPATH=".:${{ inputs.asset-name }}-ecl_watch_ui_tests:${{ github.workspace }}/selenium-java-4.22.0/*:${{ github.workspace }}/testng-7.7.1.jar:${{ github.workspace }}/jackson-annotations-2.17.0.jar:${{ github.workspace }}/jackson-core-2.17.0.jar:${{ github.workspace }}/jackson-databind-2.17.0.jar:${{ github.workspace }}/jcommander-1.82.jar"
+          export CLASSPATH=".:${{ inputs.asset-name }}-ecl_watch_ui_tests:${{ github.workspace }}/testng-7.7.1.jar:${{ github.workspace }}/jackson-annotations-2.17.0.jar:${{ github.workspace }}/jackson-core-2.17.0.jar:${{ github.workspace }}/jackson-databind-2.17.0.jar:${{ github.workspace }}/jcommander-1.82.jar"
+          # Add all unzipped JAR files to the CLASSPATH
+          for jar in selenium-java-4.22.0/*.jar; do
+            export CLASSPATH="$CLASSPATH:${{ github.workspace }}/$jar"
+          done
           pushd ${{ inputs.asset-name }}-ecl_watch_ui_tests
           find . -iname '*.java' -type f -print -exec javac {} \;
           java framework.TestRunner detail