diff --git a/Lib/test/json_tests/test_decode.py b/Lib/test/json_tests/test_decode.py
index 9fbaa3b..4f7896e 100644
--- a/Lib/test/json_tests/test_decode.py
+++ b/Lib/test/json_tests/test_decode.py
@@ -54,6 +54,15 @@
         self.check_keys_reuse(s, self.loads)
         self.check_keys_reuse(s, self.json.decoder.JSONDecoder().decode)
 
+    def test_extra_data(self):
+        s = '[1, 2, 3]5'
+        msg = 'Extra data'
+        self.assertRaisesRegexp(ValueError, msg, self.loads, s)
+
+    def test_invalid_escape(self):
+        s = '["abc\\y"]'
+        msg = 'escape'
+        self.assertRaisesRegexp(ValueError, msg, self.loads, s)
 
 class TestPyDecode(TestDecode, PyTest): pass
 class TestCDecode(TestDecode, CTest): pass
diff --git a/Misc/ACKS b/Misc/ACKS
index c3c59de..2e72f22 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -218,6 +218,7 @@
 Eric Daniel
 Scott David Daniels
 Ben Darnell
+Kushal Das
 Jonathan Dasteel
 John DeGood
 Ned Deily
diff --git a/Misc/NEWS b/Misc/NEWS
index 8fdd515..86b178b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -425,6 +425,9 @@
 Tests
 -----
 
+- Issue #15615: Add some tests for the json module's handling of invalid
+  input data.  Patch by Kushal Das.
+
 - Issue #15496: Add directory removal helpers for tests on Windows.
   Patch by Jeremy Kloth.