diff --git a/projects/project-a/Makefile b/projects/project-a/Makefile
index 35375ef..d8cf5e4 100644
--- a/projects/project-a/Makefile
+++ b/projects/project-a/Makefile
@@ -27,7 +27,7 @@ build:
 
 # Run the tests in the docker container
 test:
-	docker run --rm -it -v `pwd`/tests:/project/tests:ro --entrypoint /bin/bash $(IMAGE_NAME) -c 'pip install pytest; python -m pytest /project/tests'
+	docker run --rm -v `pwd`/tests:/project/tests:ro --entrypoint /bin/bash $(IMAGE_NAME) -c 'pip install pytest; python -m pytest /project/tests'
 
 # Remove the docker image
 clean:
diff --git a/projects/project-a/src/pipeline.py b/projects/project-a/src/pipeline.py
index 2410ea8..c83532a 100644
--- a/projects/project-a/src/pipeline.py
+++ b/projects/project-a/src/pipeline.py
@@ -9,7 +9,7 @@ def run(self):
         print("Running pipeline A")
 
     def preprocess(self):
-        pass
+        print("Preprocessing data")
 
     def feature_extraction(self):
         pass