diff --git a/test/parallel/test-zlib-unused-weak.js b/test/parallel/test-zlib-unused-weak.js
index e74384eccf05c7..2c1e2d729030dd 100644
--- a/test/parallel/test-zlib-unused-weak.js
+++ b/test/parallel/test-zlib-unused-weak.js
@@ -6,6 +6,7 @@ const zlib = require('zlib');
 
 // Tests that native zlib handles start out their life as weak handles.
 
+global.gc();
 const before = process.memoryUsage().external;
 for (let i = 0; i < 100; ++i)
   zlib.createGzip();