diff --git a/examples/properties_dictionary.py b/examples/properties_dictionary.py
index 1dccf688..55849148 100644
--- a/examples/properties_dictionary.py
+++ b/examples/properties_dictionary.py
@@ -77,7 +77,7 @@ def put(self, new_property_value):
 app, labthing = create_app(
     __name__,
     prefix="/api",
-    title=f"My Lab Device API",
+    title="My Lab Device API",
     description="Test LabThing-based API",
     version="0.1.0",
 )
diff --git a/examples/simple_extensions.py b/examples/simple_extensions.py
index 41821484..f9a5f31c 100644
--- a/examples/simple_extensions.py
+++ b/examples/simple_extensions.py
@@ -128,7 +128,7 @@ def get(self):
 app, labthing = create_app(
     __name__,
     prefix="/api",
-    title=f"My Lab Device API",
+    title="My Lab Device API",
     description="Test LabThing-based API",
     version="0.1.0",
 )
diff --git a/tests/test_server_default_views.py b/tests/test_server_default_views.py
index c609bda3..84f356d4 100644
--- a/tests/test_server_default_views.py
+++ b/tests/test_server_default_views.py
@@ -44,7 +44,7 @@ def task_func():
 
 def test_task_representation_missing(thing_client):
     with thing_client as c:
-        assert c.get(f"/tasks/missing_id").status_code == 404
+        assert c.get("/tasks/missing_id").status_code == 404
 
 
 def test_task_kill(thing_client):
@@ -68,4 +68,4 @@ def task_func():
 
 def test_task_kill_missing(thing_client):
     with thing_client as c:
-        assert c.delete(f"/tasks/missing_id").status_code == 404
+        assert c.delete("/tasks/missing_id").status_code == 404