diff --git a/.gitignore b/.gitignore
index 98da687d682..e4d0670940f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -94,3 +94,4 @@ tests/fsharpqa/Source/*FSharpQA_Failures.lst
 *.orig
 *.mdf
 *.ldf
+tests/**/FSharp.Core.dll