diff --git a/build-contract b/build-contract
index 1fe04c1..ab86def 100755
--- a/build-contract
+++ b/build-contract
@@ -51,7 +51,7 @@ function wait_for_contract {
 }
 
 # Perform tests
-BUILD_FLAGS='';
+BUILD_FLAGS="$BUILD_FLAGS";
 if [[ $DO_PUSH == true ]]; then
   BUILD_FLAGS="$BUILD_FLAGS --pull";
 fi