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