diff --git a/services/domain/stryker-config.json b/services/domain/stryker-config.json
index 935dfd7..0391844 100644
--- a/services/domain/stryker-config.json
+++ b/services/domain/stryker-config.json
@@ -4,7 +4,8 @@
     "test-projects": ["Big.Tests/Big.Tests.csproj"],
     "reporters": ["progress", "html"],
     "mutate": [
-      "!**/OpenZaakJobPump.cs"
+      "!**/OpenZaakJobPump.cs",
+      "!**/BeoordelingEscalatiePump.cs"
     ],
     "thresholds": {
       "high": 95,