diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 9c8eaaa..f5f5e57 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -38,10 +38,7 @@ jobs:
 
       - name: Clang-Format
         working-directory: ${{github.workspace}}/ports/cpp
-        run: |
-          find source test -iname '*.hpp' -o -iname '*.cpp' \
-          | xargs clang-format-18 -Werror --dry-run \
-              --fallback-style=Google --verbose
+        run: sh ./ci/check-format.sh
 
       - name: Configure
         working-directory: ${{github.workspace}}/ports/cpp
@@ -58,14 +55,10 @@ jobs:
         run: make
 
       - name: Unit Test
-        working-directory: ${{github.workspace}}/ports/cpp/build/test
-        run: |
-          ctest 
-          cat Testing/Temporary/LastTest.log
+        working-directory: ${{github.workspace}}/ports/cpp
+        run: sh ./ci/test.sh
 
       - name: Clang-Tidy on sources
         if: matrix.cmake_build_type == 'Release'
         working-directory: ${{github.workspace}}/ports/cpp
-        run: |
-          find source -iname '*.hpp' -o -iname '*.cpp' \
-          | xargs clang-tidy-18 -p build/compile_commands.json
+        run: sh ./ci/check-style.sh
diff --git a/ports/cpp/ci/check-format.sh b/ports/cpp/ci/check-format.sh
new file mode 100755
index 0000000..9ec023a
--- /dev/null
+++ b/ports/cpp/ci/check-format.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+CLANG_FORMAT="clang-format"
+if command -v clang-format-18 > /dev/null 2>&1; then
+    CLANG_FORMAT="clang-format-18"
+fi
+
+find source test -iname '*.hpp' -o -iname '*.cpp' \
+| xargs "$CLANG_FORMAT" -Werror --dry-run \
+    --fallback-style=Google --verbose
diff --git a/ports/cpp/ci/check-style.sh b/ports/cpp/ci/check-style.sh
new file mode 100644
index 0000000..600782d
--- /dev/null
+++ b/ports/cpp/ci/check-style.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+CLANG_TIDY="clang-tidy"
+if command -v clang-tidy-18 > /dev/null 2>&1; then
+    CLANG_TIDY="clang-tidy-18"
+fi
+
+find source -iname '*.hpp' -o -iname '*.cpp' \
+| xargs "$CLANG_TIDY" -p build/compile_commands.json
diff --git a/ports/cpp/ci/test.sh b/ports/cpp/ci/test.sh
new file mode 100644
index 0000000..f871ded
--- /dev/null
+++ b/ports/cpp/ci/test.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+cd "$(dirname "$0")"/../build/test
+
+ctest
+if [ $? -ne 0 ]; then
+    cat Testing/Temporary/LastTest.log
+    exit 1
+fi
+
+exit 0 # https://github.com/mike-lischke/antlr4-c3/issues/136
+
+set -e
+
+TESTS="
+whitebox
+expr
+cpp14
+"
+
+for test in $TESTS; do
+    for i in $(seq 5); do
+        (cd "./$test" && "./antlr4-c3-test-$test" --gtest_shuffle)
+    done
+done