diff --git a/psl/psl/tests/attributes/id_positive.rs b/psl/psl/tests/attributes/id_positive.rs
index 671c733887e..c8fff4203e7 100644
--- a/psl/psl/tests/attributes/id_positive.rs
+++ b/psl/psl/tests/attributes/id_positive.rs
@@ -163,7 +163,7 @@ fn should_allow_string_ids_with_ulid() {
         .assert_has_scalar_field("id")
         .assert_scalar_type(ScalarType::String)
         .assert_default_value()
-        .assert_cuid();
+        .assert_ulid();
 
     model.assert_id_on_fields(&["id"]);
 }
diff --git a/psl/psl/tests/common/asserts.rs b/psl/psl/tests/common/asserts.rs
index 4d803c8f20b..6d66e41cde7 100644
--- a/psl/psl/tests/common/asserts.rs
+++ b/psl/psl/tests/common/asserts.rs
@@ -82,6 +82,7 @@ pub(crate) trait DefaultValueAssert {
     fn assert_constant(&self, val: &str) -> &Self;
     fn assert_bytes(&self, val: &[u8]) -> &Self;
     fn assert_now(&self) -> &Self;
+    fn assert_ulid(&self) -> &Self;
     fn assert_cuid(&self) -> &Self;
     fn assert_cuid_version(&self, version: u8) -> &Self;
     fn assert_uuid(&self) -> &Self;
@@ -429,6 +430,12 @@ impl DefaultValueAssert for walkers::DefaultValueWalker<'_> {
         self
     }
 
+    #[track_caller]
+    fn assert_ulid(&self) -> &Self {
+        self.value().assert_ulid();
+        self
+    }
+
     #[track_caller]
     fn assert_cuid(&self) -> &Self {
         self.value().assert_cuid();
@@ -634,6 +641,13 @@ impl DefaultValueAssert for ast::Expression {
         self
     }
 
+    #[track_caller]
+    fn assert_ulid(&self) -> &Self {
+        assert!(matches!(self, ast::Expression::Function(name, _, _) if name == "ulid"));
+
+        self
+    }
+
     #[track_caller]
     fn assert_cuid(&self) -> &Self {
         assert!(matches!(self, ast::Expression::Function(name, _, _) if name == "cuid"));