diff --git a/.github/workflows/pr_tests.yml b/.github/workflows/pr_tests.yml
index f6a678a45..786feeced 100644
--- a/.github/workflows/pr_tests.yml
+++ b/.github/workflows/pr_tests.yml
@@ -1,18 +1,13 @@
 name: Tests
 
+# DISABLED: Changed from automatic PR triggers to manual only
 on:
-  pull_request:
-    branches: [master, develop]
-    paths-ignore:
-      - "**.md"
-      - "docs/**"
-      - "images/**"
-  pull_request_target:
-    branches: [master, develop]
-    paths-ignore:
-      - "**.md"
-      - "docs/**"
-      - "images/**"
+  workflow_dispatch:
+    inputs:
+      reason:
+        description: "Reason for manual test run"
+        required: false
+        default: "Manual test execution"
 
 concurrency:
   group: tests-${{ github.head_ref || github.run_id }}
@@ -47,8 +42,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
         with:
-          ref: ${{github.event.pull_request.head.ref}}
-          repository: ${{github.event.pull_request.head.repo.full_name}}
+          submodules: recursive
 
       - name: Get release version string
         run: echo "long=$(./bin/buildinfo.py long)" >> $GITHUB_OUTPUT