diff --git a/Makefile b/Makefile
index 60ed0886d..4648ef234 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ core-dev: fmtcheck generate
 
 # Shorthand for quickly testing the core of Terraform (i.e. "not providers")
 core-test: generate
-	@echo "Testing core packages..." && go test $(shell go list ./... | grep -v builtin)
+	@echo "Testing core packages..." && go test $(shell go list ./... | grep -v -E 'builtin|vendor')
 
 # Shorthand for building and installing just one plugin for local testing.
 # Run as (for example): make plugin-dev PLUGIN=provider-aws