diff --git a/spark/src/test/resources/sql-tests/expressions/string/lower_enabled.sql b/spark/src/test/resources/sql-tests/expressions/string/lower_enabled.sql
index 10c188b4415..637ee48f160 100644
--- a/spark/src/test/resources/sql-tests/expressions/string/lower_enabled.sql
+++ b/spark/src/test/resources/sql-tests/expressions/string/lower_enabled.sql
@@ -15,8 +15,9 @@
 -- specific language governing permissions and limitations
 -- under the License.
 
--- Test lower() with the standard allowIncompatible opt-in (happy path)
--- Config: spark.comet.expression.Lower.allowIncompatible=true
+-- Covers the native case-conversion path for lower(), not the codegen
+-- dispatcher used by lower.sql. ASCII inputs only.
+-- Config: spark.comet.caseConversion.enabled=true
 
 statement
 CREATE TABLE test_lower_enabled(s string) USING parquet
diff --git a/spark/src/test/resources/sql-tests/expressions/string/upper_enabled.sql b/spark/src/test/resources/sql-tests/expressions/string/upper_enabled.sql
index e1035ab37fa..610fc26d4ad 100644
--- a/spark/src/test/resources/sql-tests/expressions/string/upper_enabled.sql
+++ b/spark/src/test/resources/sql-tests/expressions/string/upper_enabled.sql
@@ -15,8 +15,9 @@
 -- specific language governing permissions and limitations
 -- under the License.
 
--- Test upper() with the standard allowIncompatible opt-in (happy path)
--- Config: spark.comet.expression.Upper.allowIncompatible=true
+-- Covers the native case-conversion path for upper(), not the codegen
+-- dispatcher used by upper.sql. ASCII inputs only.
+-- Config: spark.comet.caseConversion.enabled=true
 
 statement
 CREATE TABLE test_upper_enabled(s string) USING parquet