diff --git a/robottelo/utils/datafactory.py b/robottelo/utils/datafactory.py
index bbfae05520..27bf92fabe 100644
--- a/robottelo/utils/datafactory.py
+++ b/robottelo/utils/datafactory.py
@@ -428,7 +428,8 @@ def valid_org_names_list():
 @filtered_datapoint
 def valid_usernames_list():
     """Returns a list of valid user names."""
-    return generate_strings_list(exclude_types=['html'], min_length=1, max_length=50)
+    # utf8 excluded due to BZ:2169988
+    return generate_strings_list(exclude_types=['html', 'utf8'], min_length=1, max_length=50)
 
 
 @filtered_datapoint
diff --git a/tests/robottelo/test_datafactory.py b/tests/robottelo/test_datafactory.py
index e870ac1654..7d5a6c12b7 100644
--- a/tests/robottelo/test_datafactory.py
+++ b/tests/robottelo/test_datafactory.py
@@ -63,7 +63,7 @@ def test_filtered_datapoint(self, run_one_datapoint):
             assert len(datafactory.valid_interfaces_list()) == 3
             assert len(datafactory.valid_names_list()) == 15
             assert len(datafactory.valid_org_names_list()) == 7
-            assert len(datafactory.valid_usernames_list()) == 6
+            assert len(datafactory.valid_usernames_list()) == 5
             assert len(datafactory.valid_cron_expressions()) == 4
             assert len(datafactory.valid_docker_repository_names()) == 7