diff --git a/.github/workflows/build_tests.yml b/.github/workflows/build_tests.yml
index 9b1db49..be660d9 100644
--- a/.github/workflows/build_tests.yml
+++ b/.github/workflows/build_tests.yml
@@ -91,7 +91,10 @@ jobs:
       run: |
         export PATH=/usr/share/miniconda/bin:$PATH
         coverage erase
-        coverage run --context=${{ matrix.os }}.py${{ matrix.python-version }} --source=chama --omit="*/tests/*" -m nose -v --nologcapture --with-doctest --doctest-extension=.rst --traverse-namespace documentation/*.rst chama
+        #coverage run --context=${{ matrix.os }}.py${{ matrix.python-version }} --source=chama --omit="*/tests/*" -m nose -v --nologcapture --with-doctest --doctest-extension=.rst --traverse-namespace documentation/*.rst chama
+        coverage run --context=${{ matrix.os }}.py${{ matrix.python-version }} --source=chama --omit="*/tests/*" -m pytest  --doctest-modules --doctest-glob="*.rst" chama
+        coverage run --context=${{ matrix.os }}.py${{ matrix.python-version }} --source=chama --omit="*/tests/*" --append -m pytest --doctest-glob="*.rst" documentation
+     
       env:
         COVERAGE_FILE: .coverage.${{ matrix.python-version }}.${{ matrix.os }}
     - name: Save coverage
diff --git a/documentation/developers.rst b/documentation/developers.rst
index 58f6608..48a2613 100644
--- a/documentation/developers.rst
+++ b/documentation/developers.rst
@@ -24,9 +24,9 @@ The latest stable version is hosted on PyPI at https://pypi.python.org/pypi/cham
 **Testing:**
 Automated testing is run using TravisCI at https://travis-ci.org/sandialabs/chama.
 Test coverage statistics are collected using Coveralls at https://coveralls.io/github/sandialabs/chama.
-Tests can be run locally using nosetests::
+Tests can be run locally using pytest::
   
-	nosetests -v --with-coverage --cover-package=chama chama
+	pytest chama
 
 **Documentation:**
 Documentation is built using Read the Docs and hosted at https://chama.readthedocs.io.
diff --git a/documentation/installation.rst b/documentation/installation.rst
index ca27b7b..c497159 100644
--- a/documentation/installation.rst
+++ b/documentation/installation.rst
@@ -39,7 +39,7 @@ Optional Python package dependencies include:
 
 * Matplotlib [Hunt07]_: Used to produce graphics, 
   http://matplotlib.org.
-* nose: Used to run software tests, http://nose.readthedocs.io.
+* pytest: Used to run software tests, https://docs.pytest.org/.
 
 Required Pyomo supported MIP solver:
 
diff --git a/requirements.txt b/requirements.txt
index c1e2935..bb75005 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,5 @@ numpy
 scipy
 
 # Optional
-nose
+pytest
 matplotlib