diff --git a/setup.py b/setup.py
index 7255b032c..929b9c77d 100644
--- a/setup.py
+++ b/setup.py
@@ -99,8 +99,6 @@
         "test": [
             "ipywidgets",
             "mock",
-            # TODO: unpin
-            "jupyter_server~=1.0.1",
             "matplotlib",
             "pytest",
             "pytest-tornasync",
diff --git a/tests/conftest.py b/tests/conftest.py
index d19e0e3ac..c25539aab 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -7,6 +7,11 @@
 BASE_DIR = os.path.dirname(__file__)
 
 
+@pytest.fixture
+def base_url():
+    return "/"
+
+
 @pytest.fixture
 def notebook_directory():
     return os.path.join(BASE_DIR, 'notebooks')