diff --git a/oslo/utils/uuidutils.py b/oslo/utils/uuidutils.py
index 52c1ded2..62b0b5f4 100644
--- a/oslo/utils/uuidutils.py
+++ b/oslo/utils/uuidutils.py
@@ -28,7 +28,8 @@ def _format_uuid_string(string):
     return (string.replace('urn:', '')
                   .replace('uuid:', '')
                   .strip('{}')
-                  .replace('-', ''))
+                  .replace('-', '')
+                  .lower())
 
 
 def is_uuid_like(val):
diff --git a/tests/test_uuidutils.py b/tests/test_uuidutils.py
index 14512e02..63e55511 100644
--- a/tests/test_uuidutils.py
+++ b/tests/test_uuidutils.py
@@ -44,6 +44,9 @@ class UUIDUtilsTest(test_base.BaseTestCase):
         self.assertTrue(uuidutils.is_uuid_like(
             '{}---bbb---aaa--aaa--aaa-----aaa---aaa--bbb-bbb---bbb-bbb-bb-{}'))
 
+    def test_is_uuid_like_insensitive(self):
+        self.assertTrue(uuidutils.is_uuid_like(str(uuid.uuid4()).upper()))
+
     def test_id_is_uuid_like(self):
         self.assertFalse(uuidutils.is_uuid_like(1234567))