diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7c0d5fd..0f0d7aa 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,12 +29,12 @@ build-job: # This job runs in the build stage, which runs first.
     - docker push $CI_REGISTRY_IMAGE
     - echo "Build complete."
 
-# unit-test-job: # This job runs in the test stage.
-#   stage: test
-#   script:
-#     - echo "Running unit tests..."
-#     - python3 -munittest discover
-#     - echo "Testing complete"
+unit-test-job: # This job runs in the test stage.
+  stage: test
+  script:
+    - echo "Running unit tests..."
+    - python3 -munittest discover
+    - echo "Testing complete"
 
 lint-test-job: # This job also runs in the test stage.
   stage: test # It can run at the same time as unit-test-job (in parallel).
diff --git a/dockstat.py b/dockstat.py
index 940cc10..e5a3628 100644
--- a/dockstat.py
+++ b/dockstat.py
@@ -103,7 +103,11 @@ class HTTPHandler(MetricsHandler):  # type: ignore[misc]
         )
 
         for container in self.docker_client.containers.list(all=True):
-            data = self.docker_api.inspect_container(container.id)
+            try:
+                data = self.docker_api.inspect_container(container.id)
+            except docker.errors.NotFound:
+                print(f'WARNING: Container {container.id} does not exist. Skipping.')
+                continue
 
             running = bool(data['State']['Running'])
             started_at = data['State']['StartedAt']