diff --git a/GNUmakefile b/GNUmakefile
index 0defa49b..3b402f8c 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -13,7 +13,7 @@ test: fmtcheck
 		xargs -t -n4 go test $(TESTARGS) -timeout=30s -parallel=4
 
 testacc: fmtcheck
-	TF_ACC=1 TF_SCHEMA_PANIC_ON_ERROR=1 go test $(TEST) -v $(TESTARGS) -timeout 120m -ldflags="-X=github.com/terraform-providers/terraform-provider-google/version.ProviderVersion=acc"
+	TF_ACC=1 TF_SCHEMA_PANIC_ON_ERROR=1 go test $(TEST) -v $(TESTARGS) -timeout 240m -ldflags="-X=github.com/terraform-providers/terraform-provider-google/version.ProviderVersion=acc"
 
 fmt:
 	@echo "==> Fixing source code with gofmt..."