diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 4b1d4fe..0000000
Binary files a/.DS_Store and /dev/null differ
diff --git a/.github/workflows/tomlproject.yml b/.github/workflows/tomlproject.yml
index 90875d2..cebbe67 100644
--- a/.github/workflows/tomlproject.yml
+++ b/.github/workflows/tomlproject.yml
@@ -28,9 +28,11 @@ jobs:
       # Lint with Ruff
       # - name: Lint with Ruff
       #   run: |
-      #     ruff check . --statistics  # Lint the code using Ruff
+      #     ruff check . --statistics
 
       # Run pyest
       - name: Run Tests
         run: |
-          pytest
+          pytest --cov=pvcircuit
+          coverage xml
+          coverage html
diff --git a/README.md b/README.md
index 00092cf..613df28 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Python Tests](https://github.com/NREL/PVcircuit/actions/workflows/tomlproject.yml/badge.svg?branch=master)](https://github.com/NREL/PVcircuit/actions/workflows/tomlproject.yml)
+
 # pvcircuit
 *pvcircuit* contains objects that are building blocks for PV modeling and interactive data fitting.
 
diff --git a/pyproject.toml b/pyproject.toml
index cea2b5a..2c5a8b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -148,13 +148,14 @@ dev = [
     "check-manifest",
     "coverage",
     "pytest",
+    "pytest-cov",
     "ruff",
-
     ]
 test = [
     "check-manifest",
     "coverage",
-    "pytest"
+    "pytest",
+    "pytest-cov",
     ]
 
 # List URLs that are relevant to your project
@@ -198,3 +199,22 @@ ignore = [
     "F401", # Ignore unused imports
     # "F841", # Ignore unused variables
 ]
+
+[tool.pytest.ini_options]
+# Specify directories to ignore during testing
+norecursedirs = ["Share", "notebooks", "images", "data"]
+
+[tool.coverage.run]
+branch = true
+source = ["pvcircuit"]
+omit = [
+    "tests/*",
+    "Share/*",
+    "notebooks/*",
+    "images/*",
+    "data/*",
+    "pvcircuit/PlotWithControls.py",
+]
+
+[tool.coverage.report]
+show_missing = false
\ No newline at end of file
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29