--- a
+++ b/tests/generative/example.py
@@ -0,0 +1,26 @@
+# A tiny example of a generative test case defined in a standalone file so that we can
+# check that the `test_query_model_example_file` function works correctly
+from ehrql.query_model.nodes import (
+    AggregateByPatient,
+    Column,
+    Dataset,
+    SelectColumn,
+    SelectPatientTable,
+    TableSchema,
+)
+
+
+p0 = SelectPatientTable(
+    "p0",
+    TableSchema(
+        i1=Column(int),
+    ),
+)
+
+dataset = Dataset(
+    population=AggregateByPatient.Exists(p0),
+    variables={"v": SelectColumn(p0, "i1")},
+    events={},
+    measures=None,
+)
+data = []