diff --git a/pkgs/build-support/vm/test.nix b/pkgs/build-support/vm/test.nix
index 7e3402af1deb..886b319763e3 100644
--- a/pkgs/build-support/vm/test.nix
+++ b/pkgs/build-support/vm/test.nix
@@ -9,7 +9,7 @@ with vmTools;
 
   buildHelloInVM = runInLinuxVM hello;
 
-  buildPanInVM = runInLinuxVM pan;
+  buildPanInVM = runInLinuxVM (pan // { memSize = 2048; });
 
 
   testRPMImage = makeImageTestScript diskImages.fedora27x86_64;