diff --git a/.github/workflows/build-simulator.yaml b/.github/workflows/build-simulator.yaml
index af1470df35..f1065ea927 100644
--- a/.github/workflows/build-simulator.yaml
+++ b/.github/workflows/build-simulator.yaml
@@ -40,3 +40,7 @@ jobs:
       with:
         name: rusefi_simulator_linux
         path: ./simulator/build/rusefi_simulator
+
+    - name: Configuration Definition CI, without pushing new .jar
+      working-directory: ./java_tools/configuration_definition
+      run: ant