diff --git a/.github/workflows/spec-tests.yml b/.github/workflows/spec-tests.yml
index e9b88239..0e55fa6b 100644
--- a/.github/workflows/spec-tests.yml
+++ b/.github/workflows/spec-tests.yml
@@ -42,7 +42,7 @@ jobs:
       run: php echo.php &
 
     - name: Set server URL
-      run: sed -i "s/ws:\/\/HOST:8080/ws:\/\/$(ip route show default | awk '/default/ {print $3}'):8080/g" ./client-spec.json
+      run: sed -i "s/ws:\/\/HOST:8080/ws:\/\/$(ip route show default | awk '/default/ {print $3}'):8080/g" client-spec.json
 
     - name: Run specification tests
       run: |
diff --git a/client-spec.json b/client-spec.json
index 7060a60b..2b6f839d 100644
--- a/client-spec.json
+++ b/client-spec.json
@@ -1,7 +1,7 @@
 {
     "options": { "failByDrop": false },
     "outdir": "/mnt/autobahn/reports",
-    "servers": [{ "agent": "Reverb", "url": "ws://host.docker.internal:8080", "options": { "version": 18 } }],
+    "servers": [{ "agent": "Reverb", "url": "ws://HOST:8080", "options": { "version": 18 } }],
     "cases": ["*"],
     "exclude-cases": [
         "12.*",