diff --git a/docs/internals.rst b/docs/internals.rst
index 43944de9..7b4c1755 100644
--- a/docs/internals.rst
+++ b/docs/internals.rst
@@ -166,7 +166,7 @@ Example usage:
 
 .. code-block:: python
 
-    def get_version(conn);
+    def get_version(conn):
         return conn.execute(
             "select sqlite_version()"
         ).fetchall()[0][0]
diff --git a/tests/test_database.py b/tests/test_database.py
index d4055776..1f1a3a7e 100644
--- a/tests/test_database.py
+++ b/tests/test_database.py
@@ -7,7 +7,7 @@ import uuid
 
 
 @pytest.mark.asyncio
-async def test_execute1(app_client):
+async def test_execute(app_client):
     db = app_client.ds.databases["fixtures"]
     results = await db.execute("select * from facetable")
     assert isinstance(results, Results)
@@ -42,6 +42,16 @@ async def test_results_single_value(app_client, query, expected):
             results.single_value()
 
 
+@pytest.mark.asyncio
+async def test_execute_fn(app_client):
+    db = app_client.ds.databases["fixtures"]
+
+    def get_1_plus_1(conn):
+        return conn.execute("select 1 + 1").fetchall()[0][0]
+
+    assert 2 == await db.execute_fn(get_1_plus_1)
+
+
 @pytest.mark.parametrize(
     "tables,exists",
     (