diff --git a/.gitignore b/.gitignore
index c10e61c..32dccde 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,7 +36,7 @@ doxygen
 
 !/testdata/functional/*.out
 !/testdata/h_functional/*.out
-!/testdata/performance/*.out
+testdata/performance/
 build/
 .antlr
 .vscode/