diff --git a/.github/workflows/runtests.yml b/.github/workflows/runtests.yml
index f47568e..50eb019 100644
--- a/.github/workflows/runtests.yml
+++ b/.github/workflows/runtests.yml
@@ -11,6 +11,8 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
+      matrix:
+        python: ['3.7', '3.8', '3.9', '3.10']
 
     steps:
     - uses: actions/checkout@v2
@@ -22,6 +24,8 @@ jobs:
         cache-env: true
         environment-file: yeadon-dev-env.yml
         environment-name: yeadon-dev
+        extrax-specs: |
+          python=${{ matrix.python }}
 
     - name: Run the tests
       shell: bash -l {0}
diff --git a/yeadon-dev-env.yml b/yeadon-dev-env.yml
index 0ec834e..8bea398 100644
--- a/yeadon-dev-env.yml
+++ b/yeadon-dev-env.yml
@@ -6,7 +6,6 @@ dependencies:
   - nose
   - numpy >=1.6.1
   - numpydoc
-  - python =3.7.*
   - pyyaml >=3.10
   - setuptools
   - sphinx
diff --git a/yeadon/tests/test_inertia.py b/yeadon/tests/test_inertia.py
index 04a8c3e..b477283 100644
--- a/yeadon/tests/test_inertia.py
+++ b/yeadon/tests/test_inertia.py
@@ -157,4 +157,4 @@ def test_rotate_inertia():
                         [0.0, 0.0, 0.0],
                         [0.0, 0.0, 10.0]])
 
-    testing.assert_allclose(I_b, expected_I_b, atol=1e-16)
+    testing.assert_allclose(I_b, expected_I_b, atol=1e-14)
diff --git a/yeadon/tests/test_segment.py b/yeadon/tests/test_segment.py
index 2de6f56..e259c53 100644
--- a/yeadon/tests/test_segment.py
+++ b/yeadon/tests/test_segment.py
@@ -275,4 +275,4 @@ def test_rotate_inertia(self):
                             [0.0, 0.0, 0.0],
                             [0.0, 0.0, 10.0]])
 
-        testing.assert_allclose(I_b, expected_I_b, atol=1e-16)
+        testing.assert_allclose(I_b, expected_I_b, atol=1e-14)
diff --git a/yeadon/tests/test_solid.py b/yeadon/tests/test_solid.py
index 866950a..04ccd49 100644
--- a/yeadon/tests/test_solid.py
+++ b/yeadon/tests/test_solid.py
@@ -524,4 +524,4 @@ def test_rotate_inertia():
                         [0.0, 0.0, 0.0],
                         [0.0, 0.0, 10.0]])
 
-    testing.assert_allclose(I_b, expected_I_b, atol=1e-16)
+    testing.assert_allclose(I_b, expected_I_b, atol=1e-14)