diff --git a/.github/workflows/pytest-lsp-pr.yml b/.github/workflows/pytest-lsp-pr.yml
index c861a78..cad5b0c 100644
--- a/.github/workflows/pytest-lsp-pr.yml
+++ b/.github/workflows/pytest-lsp-pr.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
-        os: [ubuntu-latest]
+        os: [ubuntu-latest, windows-latest]
 
     steps:
     - uses: actions/checkout@v3
@@ -38,24 +38,25 @@ jobs:
         # dev version number e.g. v1.2.3-dev4
         ./scripts/make-release.sh pytest-lsp
       name: Set Version
-      if: matrix.python-version == '3.10'
+      if: matrix.python-version == '3.10' && matrix.os == 'ubuntu-latest'
 
     - run: |
         cd lib/pytest-lsp
 
         version=$(echo ${{ matrix.python-version }} | tr -d .)
         python -m tox run -f "py${version}"
+      shell: bash
       name: Test
 
     - name: Package
       run: |
         cd lib/pytest-lsp
         python -m build
-      if: always() && matrix.python-version == '3.10'
+      if: always() && matrix.python-version == '3.10' && matrix.os == 'ubuntu-latest'
 
     - name: 'Upload Artifact'
       uses: actions/upload-artifact@v3
       with:
         name: 'dist'
         path: lib/pytest-lsp/dist
-      if: always() && matrix.python-version == '3.10'
+      if: always() && matrix.python-version == '3.10' && matrix.os == 'ubuntu-latest'
diff --git a/lib/pytest-lsp/changes/72.enhancement.rst b/lib/pytest-lsp/changes/72.enhancement.rst
new file mode 100644
index 0000000..5afc834
--- /dev/null
+++ b/lib/pytest-lsp/changes/72.enhancement.rst
@@ -0,0 +1 @@
+It is now possible to set the environment variables that the server under test is launched with.
diff --git a/lib/pytest-lsp/tests/test_client.py b/lib/pytest-lsp/tests/test_client.py
index 1bfc74e..102bc7f 100644
--- a/lib/pytest-lsp/tests/test_client.py
+++ b/lib/pytest-lsp/tests/test_client.py
@@ -52,14 +52,14 @@ def test_client_capabilities(
 
 @pytest_lsp.fixture(
     config=ClientServerConfig(
-        server_command=["{python}", "{server}"],
+        server_command=[r"{python}", r"{server}"],
     )
 )
 async def client(lsp_client: LanguageClient):
     await lsp_client.initialize_session(
         InitializeParams(
             capabilities=client_capabilities("{client_spec}"),
-            root_uri="{root_uri}"
+            root_uri=r"{root_uri}"
         )
     )
     yield
diff --git a/lib/pytest-lsp/tests/test_plugin.py b/lib/pytest-lsp/tests/test_plugin.py
index a964aca..15f5b13 100644
--- a/lib/pytest-lsp/tests/test_plugin.py
+++ b/lib/pytest-lsp/tests/test_plugin.py
@@ -33,14 +33,14 @@ def setup_test(pytester: pytest.Pytester, server_name: str, test_code: str):
 
 @pytest_lsp.fixture(
     config=ClientServerConfig(
-        server_command=["{python}", "{server}"],
+        server_command=[r"{python}", r"{server}"],
     )
 )
 async def client(lsp_client: LanguageClient):
     await lsp_client.initialize_session(
         InitializeParams(
             capabilities=client_capabilities("visual-studio-code"),
-            root_uri="{root_uri}"
+            root_uri=r"{root_uri}"
         )
     )
     yield