diff --git a/test/LondonTravel.Skill.Tests/xunit.runner.json b/test/LondonTravel.Skill.Tests/xunit.runner.json
index 1d280220..5411589f 100644
--- a/test/LondonTravel.Skill.Tests/xunit.runner.json
+++ b/test/LondonTravel.Skill.Tests/xunit.runner.json
@@ -1,3 +1,4 @@
 {
-  "methodDisplay": "method"
+  "methodDisplay": "method",
+  "parallelizeTestCollections": false
 }