--- a
+++ b/tests/spec/test_conftest.py
@@ -0,0 +1,26 @@
+from ehrql.query_model.nodes import Column, TableSchema
+
+from .conftest import parse_row, parse_table
+
+
+def test_parse_table():
+    assert parse_table(
+        TableSchema(i1=Column(int), i2=Column(int)),
+        """
+          |  i1 |  i2
+        --+-----+-----
+        1 | 101 | 111
+        2 | 201 |
+        """,
+    ) == [
+        {"patient_id": 1, "i1": 101, "i2": 111},
+        {"patient_id": 2, "i1": 201, "i2": None},
+    ]
+
+
+def test_parse_row():
+    assert parse_row(
+        {"patient_id": int, "i1": int, "i2": int},
+        ["patient_id", "i1", "i2"],
+        "1 | 101 | 111",
+    ) == {"patient_id": 1, "i1": 101, "i2": 111}