diff --git a/promql/engine_test.go b/promql/engine_test.go
index 2f087bfcdf..111ffc3a4b 100644
--- a/promql/engine_test.go
+++ b/promql/engine_test.go
@@ -2896,7 +2896,7 @@ func TestPreprocessAndWrapWithStepInvariantExpr(t *testing.T) {
 							},
 							PosRange: posrange.PositionRange{
 								Start: 29,
-								End:   51,
+								End:   52, // TODO(krajorama): this should be 51. https://github.com/prometheus/prometheus/issues/16053
 							},
 						},
 					},
diff --git a/promql/parser/parse_test.go b/promql/parser/parse_test.go
index 989e4b8c47..129701b010 100644
--- a/promql/parser/parse_test.go
+++ b/promql/parser/parse_test.go
@@ -4776,7 +4776,7 @@ var testExpr = []struct {
 						End:   8,
 					},
 				},
-				PosRange: posrange.PositionRange{Start: 1, End: 10}, // TODO(krajorama): this should be 9.
+				PosRange: posrange.PositionRange{Start: 1, End: 10}, // TODO(krajorama): this should be 9. https://github.com/prometheus/prometheus/issues/16053
 			},
 			PosRange: posrange.PositionRange{Start: 0, End: 10},
 		},