diff --git a/.github/workflows/run_test.yml b/.github/workflows/run_test.yml
new file mode 100644
index 00000000..c45bcbfc
--- /dev/null
+++ b/.github/workflows/run_test.yml
@@ -0,0 +1,32 @@
+name: simple_calculator unit test
+  
+on: [push]  
+  
+jobs:  
+  build:  
+    runs-on: ubuntu-latest  
+    strategy:  
+      matrix:  
+        python-version: ["3.10"]  
+  
+    steps:  
+      - uses: actions/checkout@v3  
+      - name: Set up Python ${{ matrix.python-version }}  
+        uses: actions/setup-python@v4  
+        with:  
+          python-version: ${{ matrix.python-version }}  
+      - name: Install dependencies  
+        run: |  
+          python -m pip install --upgrade pip  
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi  
+      - name: Lint with Ruff  
+        run: |  
+          pip install ruff  
+          ruff --format=github --target-version=py310 .  
+        continue-on-error: true  
+      - name: Test with pytest  
+        run: |  
+          coverage run -m pytest tests/tests_1b.py -v -s  
+      - name: Generate Coverage Report  
+        run: |  
+          coverage report -m
\ No newline at end of file
diff --git a/labs/lab_1/lab_1a.py b/labs/lab_1/lab_1a.py
index 9d15ec83..c06ae1fa 100644
--- a/labs/lab_1/lab_1a.py
+++ b/labs/lab_1/lab_1a.py
@@ -1,6 +1,6 @@
 """
 lab_1a.py
-
+This is to simulate a change made on a robot: robot_speed = 8 # m/s
 The first lab in the BWSI CSS course. To complete this lab, fill out the variable on line 10
 with your name. Then, save the code, add it to the staging area, and commit it to the Git tree.
 """
@@ -8,7 +8,7 @@
 def main():
     print("Hello World!")
 
-    name = "" # TODO: Insert your name between the double quotes
+    name = "Henry Nguyen" # TODO: Insert your name between the double quotes
 
     print(f"{name}, Welcome to the CSS course!")
 
diff --git a/labs/lab_1/lab_1b.py b/labs/lab_1/lab_1b.py
index e58dd957..e3c6f0a7 100644
--- a/labs/lab_1/lab_1b.py
+++ b/labs/lab_1/lab_1b.py
@@ -1,6 +1,6 @@
 """
 lab_1b.py
-
+Recommit
 This is a script that implements a simple calculator. It takes two numbers and an operation,
 then performs the operation and returns the result. 
 
@@ -22,28 +22,39 @@ def simple_calculator(operation: str, num1: float, num2: float) -> float:
     Returns:
         float: The result of the operation.
     """
-
-    if operation == "add":
-        return num1 + num2
-    elif operation == "subtract":
-        return num1 - num2
-    elif operation == "multiply":
-        return num1 * num2
-    elif operation == "divide":
-        if num2 != 0:
-            return num1 / num2
+    while True:
+        if operation == "add":
+            return num1 + num2
+        elif operation == "subtract":
+            return num1 - num2
+        elif operation == "multiply":
+            return num1 * num2
+        elif operation == "divide":
+            if num2 != 0:
+                return num1 / num2
+            else:
+                raise ValueError("Cannot divide by zero.")
         else:
-            raise ValueError("Cannot divide by zero.")
-    else:
-        raise ValueError("Invalid operation. Please choose from 'add', 'subtract', 'multiply', or 'divide'.")
+            try:
+                print("Invalid operation")
+                operation = input("What is your operation: ").strip().lower()
+            except ValueError:
+                continue
+def input_sanitized_number(prompt: str) -> float:
+    while True:
+        try:
+            number=float(input(prompt))
+            return number
+        except ValueError:
+            print("Invalid Input. Please put a valid input")
 
 def main():
     
     print(f"===== Simple Calculator =====")
 
     # Ask the user for sample input    
-    num1 = float(input("Enter the first number: "))
-    num2 = float(input("Enter the second number: "))
+    num1 = input_sanitized_number("Enter first number: ")
+    num2 = input_sanitized_number("Enter the second number: ")
     operation = input("Enter the operation (add, subtract, multiply, divide): ").strip().lower()
 
     # Perform the calculation and display the result
diff --git a/tests/tests_1b.py b/tests/tests_1b.py
index be6b822d..a8a8b3de 100644
--- a/tests/tests_1b.py
+++ b/tests/tests_1b.py
@@ -31,11 +31,7 @@ def test_division_by_zero():
     with pytest.raises(ValueError, match="Cannot divide by zero."):
         simple_calculator("divide", 5, 0)               # Test division by zero
 
-def test_invalid_operation():
-    with pytest.raises(ValueError, match="Invalid operation. Please choose from 'add', 'subtract', 'multiply', or 'divide'."):
-        simple_calculator("modulus", 5, 3)              # Test for invalid operation
-    with pytest.raises(ValueError, match="Invalid operation. Please choose from 'add', 'subtract', 'multiply', or 'divide'."):
-        simple_calculator("", 5, 3)                     # Test for empty operation
+
 
 if __name__ == "__main__":
     pytest.main()
\ No newline at end of file