diff --git a/.github/workflows/spine-cpp-compatibility.yml b/.github/workflows/spine-cpp-compatibility.yml
index 537e2c46a..1f7813ee2 100644
--- a/.github/workflows/spine-cpp-compatibility.yml
+++ b/.github/workflows/spine-cpp-compatibility.yml
@@ -35,9 +35,9 @@ jobs:
         key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
         restore-keys: ${{ runner.os }}-gradle
 
-    - name: Build spine-libgdx first
+    - name: Build spine-libgdx and test fat jar
       working-directory: spine-libgdx
-      run: ./gradlew build
+      run: ./gradlew build :spine-libgdx-tests:fatJar
 
     - name: Run C++ vs Java compatibility test
       working-directory: tests