diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 03d67013..ea9cb11d 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -24,7 +24,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: [8, 9, 10, 11] # sub-versions of Python
+        python-version: [8, 9, 10, 11, 12] # sub-versions of Python
 
     steps:
       - uses: actions/checkout@v4
diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index 378eb4d5..4763ae47 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -21,6 +21,4 @@ dependencies:
   - pytest-rerunfailures
   - pytest-timeout
   - codecov
-  - pip
-  - pip:
-    - mdtraj
+  - mdtraj