diff --git a/Tests/misc/classifyTools_test.py b/Tests/misc/classifyTools_test.py
new file mode 100644
index 000000000..204db60a7
--- /dev/null
+++ b/Tests/misc/classifyTools_test.py
@@ -0,0 +1,30 @@
+from __future__ import print_function, division, absolute_import
+from fontTools.misc.py23 import *
+from fontTools.misc.classifyTools import classify
+
+
+def test_classify():
+    assert classify([]) == ([], {})
+    assert classify([[]]) == ([], {})
+    assert classify([[], []]) == ([], {})
+    assert classify([[1]]) == ([{1}], {1: {1}})
+    assert classify([[1,2]]) == ([{1, 2}], {1: {1, 2}, 2: {1, 2}})
+    assert classify([[1],[2]]) == ([{1}, {2}], {1: {1}, 2: {2}})
+    assert classify([[1,2],[2]]) == ([{1}, {2}], {1: {1}, 2: {2}})
+    assert classify([[1,2],[2,4]]) == (
+        [{1}, {4}, {2}], {1: {1}, 2: {2}, 4: {4}})
+    assert classify([[1,2],[2,4,5]]) == (
+        [{4, 5}, {1}, {2}], {1: {1}, 2: {2}, 4: {4, 5}, 5: {4, 5}})
+    assert classify([[1,2],[2,4,5]], sort=False) == (
+        [{1}, {4, 5}, {2}], {1: {1}, 2: {2}, 4: {4, 5}, 5: {4, 5}})
+    assert classify([[1,2,9],[2,4,5]], sort=False) == (
+        [{1, 9}, {4, 5}, {2}],
+        {1: {1, 9}, 2: {2}, 4: {4, 5}, 5: {4, 5}, 9: {1, 9}})
+    assert classify([[1,2,9,15],[2,4,5]], sort=False) == (
+        [{1, 9, 15}, {4, 5}, {2}],
+        {1: {1, 9, 15}, 2: {2}, 4: {4, 5}, 5: {4, 5}, 9: {1, 9, 15},
+         15: {1, 9, 15}})
+    classes, mapping = classify([[1,2,9,15],[2,4,5],[15,5]], sort=False)
+    assert set([frozenset(c) for c in classes]) == set(
+        [frozenset(s) for s in ({1, 9}, {4}, {2}, {5}, {15})])
+    assert mapping == {1: {1, 9}, 2: {2}, 4: {4}, 5: {5}, 9: {1, 9}, 15: {15}}