diff --git a/Tests/ufoLib/UFO3_test.py b/Tests/ufoLib/UFO3_test.py
index 434ead8cf..bed527dba 100644
--- a/Tests/ufoLib/UFO3_test.py
+++ b/Tests/ufoLib/UFO3_test.py
@@ -4197,9 +4197,9 @@ class UFO3ReadDataTestCase(unittest.TestCase):
 		# Kerning group duplicates are removed
 		expected_groups = {
 			"group1" : ["A"],
-			"group2" : ["B", "B"],
+			"group2" : ["B", "C", "B"],
 			"public.kern1.A" : ["A"],
-			"public.kern2.B" : ["B"],
+			"public.kern2.B" : ["B", "A", "C"],
 		}
 		reader = UFOReader(self.getFontPath())
 		groups = reader.readGroups()
diff --git a/Tests/ufoLib/testdata/UFO3-Read Data.ufo/groups.plist b/Tests/ufoLib/testdata/UFO3-Read Data.ufo/groups.plist
index 8564bcd9e..d61c28164 100644
--- a/Tests/ufoLib/testdata/UFO3-Read Data.ufo/groups.plist	
+++ b/Tests/ufoLib/testdata/UFO3-Read Data.ufo/groups.plist	
@@ -9,6 +9,7 @@
 	<key>group2</key>
 	<array>
 		<string>B</string>
+		<string>C</string>
 		<string>B</string>
 	</array>
 	<key>public.kern1.A</key>
@@ -18,7 +19,10 @@
 	<key>public.kern2.B</key>
 	<array>
 		<string>B</string>
+		<string>A</string>
 		<string>B</string>
+		<string>A</string>
+		<string>C</string>
 	</array>
 </dict>
 </plist>