diff --git a/.circleci/config.yml b/.circleci/config.yml
index 63763deac..b10843eb9 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -260,5 +260,6 @@ commands:
           name: Unit Tests
           command: |
             pushd model-engine
-            GIT_TAG=$(git rev-parse HEAD) WORKSPACE=.. pytest
+            GIT_TAG=$(git rev-parse HEAD) WORKSPACE=.. pytest --cov --cov-report=xml
+            diff-cover coverage.xml --compare-branch=origin/main --fail-under=80
             popd
diff --git a/model-engine/requirements-test.txt b/model-engine/requirements-test.txt
index 9ad7b6e22..158e07435 100644
--- a/model-engine/requirements-test.txt
+++ b/model-engine/requirements-test.txt
@@ -2,6 +2,7 @@ multiprocess==0.70.14
 pytest==7.2.0
 pytest-asyncio==0.20.1
 pytest-cov==2.10.0
+diff-cover==7.7.0
 moto==3.1.12
 coverage==5.5
 mypy==1.3.0