diff --git a/packages/cosmic-swingset/package.json b/packages/cosmic-swingset/package.json
index 9b4a3abcad3..9aa818d2f04 100644
--- a/packages/cosmic-swingset/package.json
+++ b/packages/cosmic-swingset/package.json
@@ -8,7 +8,7 @@
     "build": "exit 0",
     "build:gyp": "make compile-gyp",
     "build:gyp-debug": "make compile-gyp GYP_DEBUG=--debug",
-    "test": "ava --serial",
+    "test": "ava",
     "pretty-fix": "prettier --write '**/*.js'",
     "pretty-check": "prettier --check '**/*.js'",
     "lint-fix": "yarn lint --fix",