diff --git a/tests/build_tool.sh b/tests/build_tool.sh
index 7b27293292debe91b5071ed80463f3a40a61ea78..31dcac0cd50ae7c5fab7a1c42a49478e31c622b9 100755
--- a/tests/build_tool.sh
+++ b/tests/build_tool.sh
@@ -50,4 +50,4 @@ fi
 # Cleanup
 rm $REPO/"$TARGET"_build_artifact
 rm $REPO/eris-client
-docker rmi $IMAGE:build
+docker rmi -f $IMAGE:build