diff --git a/test/run.sh b/test/run.sh
index 799767e5348..7a8a3924426 100755
--- a/test/run.sh
+++ b/test/run.sh
@@ -8,7 +8,7 @@ else
 fi
 
 if [[ "$OSTYPE" == "darwin"* ]]; then
-	cd $ROOT ; ATOM_SHELL_INTERNAL_RUN_AS_NODE=1 \
+	cd $ROOT ; ulimit -n 4096 ; ATOM_SHELL_INTERNAL_RUN_AS_NODE=1 \
 		../Electron-Build/Electron.app/Contents/MacOS/Electron \
 		node_modules/mocha/bin/_mocha $*
 else