diff --git a/tests/ImageSharp.Tests/xunit.runner.json b/tests/ImageSharp.Tests/xunit.runner.json
index 749ece438..d7b466d09 100644
--- a/tests/ImageSharp.Tests/xunit.runner.json
+++ b/tests/ImageSharp.Tests/xunit.runner.json
@@ -1,5 +1,6 @@
 {
   "shadowCopy": false,
   "methodDisplay": "method",
-  "diagnosticMessages": true
+  "diagnosticMessages": true,
+  "preEnumerateTheories": false
 }