1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py
index 9be8281ce5a..328a47b2e37 100644
--- a/Lib/test/test_codecs.py
+++ b/Lib/test/test_codecs.py
@@ -2197,6 +2197,18 @@ class CharmapTest(unittest.TestCase):
             ("", len(allbytes))
         )
 
+        self.assertRaisesRegex(TypeError,
+            "character mapping must be in range\\(0x110000\\)",
+            codecs.charmap_decode,
+            b"\x00\x01\x02", "strict", {0: "A", 1: 'Bb', 2: -2}
+        )
+
+        self.assertRaisesRegex(TypeError,
+            "character mapping must be in range\\(0x110000\\)",
+            codecs.charmap_decode,
+            b"\x00\x01\x02", "strict", {0: "A", 1: 'Bb', 2: 999999999}
+        )
+
     def test_decode_with_int2int_map(self):
         a = ord('a')
         b = ord('b')