diff --git a/.gitattributes b/.gitattributes
index a21dceececa..0c2415b4765 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +1,3 @@
 # suppress diffs for codegen in PRs
 **/codegen/**/*.sol linguist-generated=true
+test-data/**/* linguist-generated=true