Fixed unit test cases

Author: sujata-m

.github/workflows/unit_tests.yml

@@ -62,7 +62,7 @@ jobs:
           } | tee -a "$log_file"
 
           # Run unittest in verbose mode; mirror output to console and file
-          python -m coverage run --source=src -m unittest discover -s tests/unit_tests -v 2>&1 | tee -a "$log_file"
+          python -m coverage run --source=src -m unittest discover -s tests -v 2>&1 | tee -a "$log_file"
           test_status=${PIPESTATUS[0]}
 
           echo -e "\nCoverage Report\n" | tee -a "$log_file"