diff --git a/README.md b/README.md
index 5d75f6f17..b33b97c93 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Machine Learning Engineering for Production
+#  Machine Learning Engineering for Production
 
 Welcome to the public repo for [deeplearning.ai](https://www.deeplearning.ai/)'s Machine Learning Engineering for Production Specialization.
 
@@ -6,4 +6,4 @@ Here you will find public resources for the courses of this specialization.
 
 ## Want to contribute?
 
-At the time being we are not accepting Pull Requests but if you have any suggestion or spot any bug please raise an issue.
\ No newline at end of file
+At the time being we are not accepting Pull Requests but if you have any suggestion or spot any bug please raise an issue.
diff --git a/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/main.py b/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/main.py
index 2f94e9ff2..cd231e7bb 100644
--- a/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/main.py
+++ b/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/main.py
@@ -9,7 +9,7 @@
 app = FastAPI(title="Predicting Wine Class with batching")
 
 # Open classifier in global scope
-with open("models/wine.pkl", "rb") as file:
+with open("models/wine-95-fixed.pkl", "rb") as file:
     clf = pickle.load(file)
 
 
diff --git a/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/test_clf.py b/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/test_clf.py
index 2d957fecd..c3e455b06 100644
--- a/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/test_clf.py
+++ b/course4/week3-ungraded-labs/C4_W3_Lab_4_Github_Actions/app/test_clf.py
@@ -1,9 +1,9 @@
+from sklearn.pipeline import Pipeline
+from sklearn.preprocessing import StandardScaler
 import pickle
 from main import clf
 
-
 def test_accuracy():
-
     # Load test data
     with open("data/test_data.pkl", "rb") as file:
         test_data = pickle.load(file)
@@ -16,3 +16,14 @@ def test_accuracy():
 
     # Accuracy should be over 90%
     assert acc > 0.9
+
+def test_pipeline_and_scaler():
+    # Check if clf is an instance of sklearn.pipeline.Pipeline 
+    is_pipeline = isinstance(clf, Pipeline)
+    assert is_pipeline
+    
+    if is_pipeline:
+        # Check if the first step of the pipeline is an instance of 
+        # sklearn.preprocessing.StandardScaler
+        first_step = clf.named_steps.values()[0]
+        assert isinstance(first_step, StandardScaler)