diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 02f3b524..14c07f4f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -36,7 +36,7 @@ jobs:
 
         - os: windows-latest
           testset: matrix
-          conda-env: base
+          conda-env: openblas
           python-version: '3.11'
           flaky: false
           env:
@@ -44,7 +44,7 @@ jobs:
 
         - os: windows-latest
           testset: tensor
-          conda-env: base
+          conda-env: openblas
           python-version: '3.11'
           flaky: false
           env:
diff --git a/ci/requirements/py-openblas.yml b/ci/requirements/py-openblas.yml
new file mode 100644
index 00000000..9fd040d5
--- /dev/null
+++ b/ci/requirements/py-openblas.yml
@@ -0,0 +1,19 @@
+channels:
+  - defaults
+  - conda-forge
+dependencies:
+  - autoray>=0.6.12
+  - cotengra>=0.6.1
+  - coverage
+  - cytoolz
+  - joblib
+  - matplotlib
+  - networkx
+  - numba>=0.56
+  - numpy
+  - openblas
+  - psutil
+  - pytest
+  - pytest-cov
+  - scipy
+  - tqdm