diff --git a/Makefile b/Makefile
index f79c622..d85321e 100644
--- a/Makefile
+++ b/Makefile
@@ -6,4 +6,6 @@ all:
 	cd extensions/sample; make
 
 test:
+	# since some tests call separately-built binaries, clear the cache to ensure all get run
+	go clean -testcache
 	go test ./... -v