diff --git a/.coveragerc b/.coveragerc
index 8166e9d..5fbefdc 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,20 +1,31 @@
+# .coveragerc to control coverage.py
 [run]
-cover_pylib = false
+branch = True
+source = src/
+
 omit =
-  /home/travis/virtualenv/*
-  */site-packages/*
-  */bin/*
+    archive/*
+    */.local/*
 
 [report]
+# Regexes for lines to exclude from consideration
 exclude_lines =
-  pragma: no cover
-  def __repr__
-  except RuntimeError
-  except NotImplementedError
-  except ImportError
-  except FileNotFoundError
-  except CalledProcessError
-  logging.warning
-  logging.error
-  logging.critical
-  if __name__ == .__main__.:
+    # Have to re-enable the standard pragma
+    pragma: no cover
+
+    # Don't complain about missing debug-only code:
+    def __repr__
+    if self\.debug
+
+    # Don't complain if tests don't hit defensive assertion code:
+    raise AssertionError
+    raise NotImplementedError
+
+    # Don't complain if non-runnable code isn't run:
+    if 0:
+    if __name__ == .__main__.:
+
+ignore_errors = True
+
+[html]
+directory = coverage_html_report
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2f240dc..ffe79cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,5 @@
 name: ci
+
 on:
   push:
     paths:
@@ -25,6 +26,13 @@ jobs:
         CC: gcc-9
         FC: gfortran-9
 
+# codecov coverage
+    - run: pip install codecov pytest-cov
+    - run: pytest --cov --cov-report=xml
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v1
+
+
   macos:
     runs-on: macos-latest
     steps:
diff --git a/README.md b/README.md
index 7f496ff..c412c8d 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![image](https://zenodo.org/badge/DOI/10.5281/zenodo.240895.svg)](https://doi.org/10.5281/zenodo.240895)
 ![Actions Status](https://github.com/space-physics/iri2016/workflows/ci/badge.svg)
+[![codecov](https://codecov.io/gh/space-physics/iri2016/branch/master/graph/badge.svg)](https://codecov.io/gh/space-physics/iri2016)
 [![PyPi version](https://img.shields.io/pypi/pyversions/iri2016.svg)](https://pypi.python.org/pypi/iri2016)
 [![PyPi Download stats](http://pepy.tech/badge/iri2016)](http://pepy.tech/project/iri2016)