diff --git a/kubernetes/configmap/nginx.yaml b/kubernetes/configmap/nginx.yaml
index 1683c06..4eaa9bc 100644
--- a/kubernetes/configmap/nginx.yaml
+++ b/kubernetes/configmap/nginx.yaml
@@ -285,6 +285,9 @@ data:
                 fastcgi_pass php-upstream;
                 include fastcgi_params;
                 fastcgi_param SCRIPT_FILENAME $realpath_root/imageResizer.php;
+                fastcgi_param HTTPS $http_x_forwarded_proto;
+                fastcgi_param HTTP_HOST $request_host;
+                fastcgi_param REQUEST_SCHEME $http_x_forwarded_proto;
             }
         
             # plain 404 page for missing files accessed via CDN
diff --git a/tests/README.md b/tests/README.md
index 7597dc8..36e4d86 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -6,26 +6,28 @@ Tests for verifying Kubernetes manifest generation produces expected output.
 
 ```bash
 # Run all tests
-docker run --rm -v $(pwd):/workspace -w /workspace \
+docker run --rm --user "$(id -u):$(id -g)" -v "$(pwd)":/workspace -w /workspace \
   shopsys/kubernetes-buildpack:2.0 \
   ./tests/run-tests.sh
 
 # Run specific scenario
-docker run --rm -v $(pwd):/workspace -w /workspace \
+docker run --rm --user "$(id -u):$(id -g)" -v "$(pwd)":/workspace -w /workspace \
   shopsys/kubernetes-buildpack:2.0 \
   ./tests/run-tests.sh basic-production
 
 # Update expected files after intentional changes
-docker run --rm -v $(pwd):/workspace -w /workspace \
+docker run --rm --user "$(id -u):$(id -g)" -v "$(pwd)":/workspace -w /workspace \
   shopsys/kubernetes-buildpack:2.0 \
 ./tests/run-tests.sh --update
 
 # List available scenarios
-docker run --rm -v $(pwd):/workspace -w /workspace \
+docker run --rm --user "$(id -u):$(id -g)" -v "$(pwd)":/workspace -w /workspace \
   shopsys/kubernetes-buildpack:2.0 \
 ./tests/run-tests.sh --list
 ```
 
+Using `--user "$(id -u):$(id -g)"` ensures generated files are owned by your local user instead of `root`.
+
 ## Options
 
 ```
diff --git a/tests/scenarios/basic-production/expected/webserver.yaml b/tests/scenarios/basic-production/expected/webserver.yaml
index 95665fa..20ae8e1 100644
--- a/tests/scenarios/basic-production/expected/webserver.yaml
+++ b/tests/scenarios/basic-production/expected/webserver.yaml
@@ -300,6 +300,9 @@ data:
             fastcgi_pass php-upstream;
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $realpath_root/imageResizer.php;
+            fastcgi_param HTTPS $http_x_forwarded_proto;
+            fastcgi_param HTTP_HOST $request_host;
+            fastcgi_param REQUEST_SCHEME $http_x_forwarded_proto;
         }
 
         # plain 404 page for missing files accessed via CDN
diff --git a/tests/scenarios/development-single-domain/expected/webserver.yaml b/tests/scenarios/development-single-domain/expected/webserver.yaml
index f73fbf4..296414f 100644
--- a/tests/scenarios/development-single-domain/expected/webserver.yaml
+++ b/tests/scenarios/development-single-domain/expected/webserver.yaml
@@ -298,6 +298,9 @@ data:
             fastcgi_pass php-upstream;
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $realpath_root/imageResizer.php;
+            fastcgi_param HTTPS $http_x_forwarded_proto;
+            fastcgi_param HTTP_HOST $request_host;
+            fastcgi_param REQUEST_SCHEME $http_x_forwarded_proto;
         }
 
         # plain 404 page for missing files accessed via CDN
diff --git a/tests/scenarios/escaping-env/expected/webserver.yaml b/tests/scenarios/escaping-env/expected/webserver.yaml
index 7bec260..dde511d 100644
--- a/tests/scenarios/escaping-env/expected/webserver.yaml
+++ b/tests/scenarios/escaping-env/expected/webserver.yaml
@@ -300,6 +300,9 @@ data:
             fastcgi_pass php-upstream;
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $realpath_root/imageResizer.php;
+            fastcgi_param HTTPS $http_x_forwarded_proto;
+            fastcgi_param HTTP_HOST $request_host;
+            fastcgi_param REQUEST_SCHEME $http_x_forwarded_proto;
         }
 
         # plain 404 page for missing files accessed via CDN
diff --git a/tests/scenarios/production-with-cloudflare/expected/webserver.yaml b/tests/scenarios/production-with-cloudflare/expected/webserver.yaml
index 9d92adf..2878fd2 100644
--- a/tests/scenarios/production-with-cloudflare/expected/webserver.yaml
+++ b/tests/scenarios/production-with-cloudflare/expected/webserver.yaml
@@ -300,6 +300,9 @@ data:
             fastcgi_pass php-upstream;
             include fastcgi_params;
             fastcgi_param SCRIPT_FILENAME $realpath_root/imageResizer.php;
+            fastcgi_param HTTPS $http_x_forwarded_proto;
+            fastcgi_param HTTP_HOST $request_host;
+            fastcgi_param REQUEST_SCHEME $http_x_forwarded_proto;
         }
 
         # plain 404 page for missing files accessed via CDN