diff --git a/.github/workflows/issue-bot.yml b/.github/workflows/issue-bot.yml
index 6d6af362f1..530886afff 100644
--- a/.github/workflows/issue-bot.yml
+++ b/.github/workflows/issue-bot.yml
@@ -106,6 +106,9 @@ jobs:
           attempt_limit: 5
           attempt_delay: 1000
 
+      - name: "Add level 10 config file"
+        run: "cp issue-bot/config.level10.neon conf/"
+
       - name: "Run PHPStan"
         working-directory: "issue-bot"
         timeout-minutes: 5
diff --git a/issue-bot/config.level10.neon b/issue-bot/config.level10.neon
new file mode 100644
index 0000000000..5d052692c9
--- /dev/null
+++ b/issue-bot/config.level10.neon
@@ -0,0 +1,5 @@
+includes:
+	- config.level9.neon
+
+parameters:
+	checkImplicitMixed: true