diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index c1fd999..2fd8952 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -7,10 +7,8 @@ jobs:
     name: Swift ${{ matrix.swift }} on ${{ matrix.os }}
     strategy:
       matrix:
-        # os: [ubuntu-latest, macos-latest]
-        os: [ubuntu-latest]
-        # swift: ["5.8", "5.9"]
-        swift: ["5.9"]
+        os: [ubuntu-latest, macos-latest]
+        swift: ["5.8", "5.9"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: swift-actions/setup-swift@v1
diff --git a/Mock/app.py b/Mock/app.py
index bc1f093..725092c 100644
--- a/Mock/app.py
+++ b/Mock/app.py
@@ -36,7 +36,7 @@ def _generate_response(desired_status_code) -> Response:
         desired_status_code = int(desired_status_code)
     except:
         return make_response("Invalid Status-Code in the HTTP Header", 404)
-    response = make_response("Hello from lcl-ping mock server!")
+    response = make_response("Hello from lcl-ping mock server!\n")
     response.status_code = desired_status_code
     return response