diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 48d1bde..e1ba390 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -30,10 +30,11 @@ jobs:
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Test with pytest
       run: |
-        pytest --continue-on-collection-errors
+        git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
+        git diff origin/main HEAD --name-only -- practice | xargs dirname | sort | uniq | xargs pytest
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
\ No newline at end of file
diff --git a/practice/reverse-string/reverse_string.py b/practice/reverse-string/reverse_string.py
index 4690cc7..731a1d7 100644
--- a/practice/reverse-string/reverse_string.py
+++ b/practice/reverse-string/reverse_string.py
@@ -1,2 +1,11 @@
-def reverse(text):
-    pass
+def reverse(text): 
+  reversed_text = ""
+  for i in range(len(text)-1, -1, -1):
+    reversed_text += text[i]
+  return reversed_text
+pass
+
+ # My approach ----->
+ # initialising empty string to hold reversed text
+ # iterating through string in reverse order
+ # appending each char from end to beginning
\ No newline at end of file