diff --git a/tests/build_tool.sh b/tests/build_tool.sh
index 4c4607d8e844a6fd174adcab42303b912ae375af..f00a50d6776a8148fffc7f4f79932263082e37de 100755
--- a/tests/build_tool.sh
+++ b/tests/build_tool.sh
@@ -51,4 +51,4 @@ fi
 # Cleanup
 rm $REPO/"$TARGET"_build_artifact
 rm $REPO/eris-client
-docker rmi $IMAGE:build
+docker rmi -f $IMAGE:build