diff --git a/dart/tests/DiffMatchPatchTest.dart b/dart/tests/DiffMatchPatchTest.dart
index 9b2e680..f316615 100644
--- a/dart/tests/DiffMatchPatchTest.dart
+++ b/dart/tests/DiffMatchPatchTest.dart
@@ -462,6 +462,18 @@ void testDiffDelta() {
 
   // Convert delta string into a diff.
   Expect.listEquals(diffs, dmp.diff_fromDelta('', delta), 'diff_fromDelta: Unchanged characters.');
+
+  // 160 kb string.
+  var a = 'abcdefghij';
+  for (var i = 0; i < 14; i++) {
+    a += a;
+  }
+  diffs = [new Diff(Operation.insert, a)];
+  delta = dmp.diff_toDelta(diffs);
+  Expect.equals('+' + a, delta, 'diff_toDelta: 160kb string.');
+
+  // Convert delta string into a diff.
+  Expect.listEquals(diffs, dmp.diff_fromDelta('', delta), 'diff_fromDelta: 160kb string.');
 }
 
 void testDiffXIndex() {
diff --git a/java/tests/name/fraser/neil/plaintext/diff_match_patch_test.java b/java/tests/name/fraser/neil/plaintext/diff_match_patch_test.java
index 677eec5..2f38793 100644
--- a/java/tests/name/fraser/neil/plaintext/diff_match_patch_test.java
+++ b/java/tests/name/fraser/neil/plaintext/diff_match_patch_test.java
@@ -434,6 +434,18 @@ public static void testDiffDelta() {
 
     // Convert delta string into a diff.
     assertEquals("diff_fromDelta: Unchanged characters.", diffs, dmp.diff_fromDelta("", delta));
+
+    // 160 kb string.
+    String a = "abcdefghij";
+    for (int i = 0; i < 14; i++) {
+      a += a;
+    }
+    diffs = diffList(new Diff(INSERT, a));
+    delta = dmp.diff_toDelta(diffs);
+    assertEquals("diff_toDelta: 160kb string.", "+" + a, delta);
+
+    // Convert delta string into a diff.
+    assertEquals("diff_fromDelta: 160kb string.", diffs, dmp.diff_fromDelta("", delta));
   }
 
   public static void testDiffXIndex() {
diff --git a/javascript/tests/diff_match_patch_test.js b/javascript/tests/diff_match_patch_test.js
index 765ade8..109e56a 100644
--- a/javascript/tests/diff_match_patch_test.js
+++ b/javascript/tests/diff_match_patch_test.js
@@ -502,6 +502,18 @@ function testDiffDelta() {
 
   // Convert delta string into a diff.
   assertEquivalent(diffs, dmp.diff_fromDelta('', delta));
+
+  // 160 kb string.
+  var a = 'abcdefghij';
+  for (var i = 0; i < 14; i++) {
+    a += a;
+  }
+  diffs = [[DIFF_INSERT, a]];
+  delta = dmp.diff_toDelta(diffs);
+  assertEquals('+' + a, delta);
+
+  // Convert delta string into a diff.
+  assertEquivalent(diffs, dmp.diff_fromDelta('', delta));
 }
 
 function testDiffXIndex() {
diff --git a/lua/tests/diff_match_patch_test.lua b/lua/tests/diff_match_patch_test.lua
index 9e57143..51e44d6 100644
--- a/lua/tests/diff_match_patch_test.lua
+++ b/lua/tests/diff_match_patch_test.lua
@@ -550,6 +550,15 @@ function testDiffDelta()
 
   -- Convert delta string into a diff.
   assertEquivalent(diffs, dmp.diff_fromDelta('', delta))
+
+  -- 160 kb string.
+  local a = string.rep('abcdefghij', 16384)
+  diffs = {{DIFF_INSERT, a}};
+  delta = dmp.diff_toDelta(diffs);
+  assertEquals('+' .. a, delta);
+
+  -- Convert delta string into a diff.
+  assertEquivalent(diffs, dmp.diff_fromDelta('', delta));
 end
 
 function testDiffXIndex()
diff --git a/objectivec/Tests/DiffMatchPatchTest.m b/objectivec/Tests/DiffMatchPatchTest.m
index 00d6a3f..9697b04 100755
--- a/objectivec/Tests/DiffMatchPatchTest.m
+++ b/objectivec/Tests/DiffMatchPatchTest.m
@@ -765,6 +765,22 @@ - (void)test_diff_deltaTest {
   expectedResult = [dmp diff_fromDeltaWithText:@"" andDelta:delta error:NULL];
   XCTAssertEqualObjects(diffs, expectedResult, @"diff_fromDelta: Unchanged characters. Convert delta string into a diff.");
 
+  // 160 kb string.
+  NSString *a = @"abcdefghij";
+  NSMutableString *aMutable = [NSMutableString stringWithString:a];
+  for (int i = 0; i < 14; i++) {
+    [aMutable appendString:aMutable];
+  }
+  a = aMutable;
+  diffs = [NSMutableArray arrayWithObject:
+           [Diff diffWithOperation:DIFF_INSERT andText:a]];
+  delta = [dmp diff_toDelta:diffs];
+  XCTAssertEqualObjects([@"+" stringByAppendingString:a], delta, @"diff_toDelta: 160kb string.");
+  
+  // Convert delta string into a diff.
+  expectedResult = [dmp diff_fromDeltaWithText:@"" andDelta:delta error:NULL];
+  XCTAssertEqualObjects(diffs, expectedResult, @"diff_fromDelta: 160kb string. Convert delta string into a diff.");
+
   [dmp release];
 }
 
diff --git a/python2/tests/diff_match_patch_test.py b/python2/tests/diff_match_patch_test.py
index 8ab6625..661a6b6 100644
--- a/python2/tests/diff_match_patch_test.py
+++ b/python2/tests/diff_match_patch_test.py
@@ -452,6 +452,17 @@ def testDiffDelta(self):
     # Convert delta string into a diff.
     self.assertEquals(diffs, self.dmp.diff_fromDelta("", delta))
 
+    # 160 kb string.
+    a = "abcdefghij"
+    for i in range(14):
+      a += a
+    diffs = [(self.dmp.DIFF_INSERT, a)]
+    delta = self.dmp.diff_toDelta(diffs);
+    self.assertEquals('+' + a, delta);
+
+    # Convert delta string into a diff.
+    self.assertEquals(diffs, self.dmp.diff_fromDelta("", delta));
+
   def testDiffXIndex(self):
     # Translate a location in text1 to text2.
     self.assertEquals(5, self.dmp.diff_xIndex([(self.dmp.DIFF_DELETE, "a"), (self.dmp.DIFF_INSERT, "1234"), (self.dmp.DIFF_EQUAL, "xyz")], 2))
diff --git a/python3/tests/diff_match_patch_test.py b/python3/tests/diff_match_patch_test.py
index 71646c9..3659d3e 100644
--- a/python3/tests/diff_match_patch_test.py
+++ b/python3/tests/diff_match_patch_test.py
@@ -455,6 +455,17 @@ def testDiffDelta(self):
     # Convert delta string into a diff.
     self.assertEqual(diffs, self.dmp.diff_fromDelta("", delta))
 
+    # 160 kb string.
+    a = "abcdefghij"
+    for i in range(14):
+      a += a
+    diffs = [(self.dmp.DIFF_INSERT, a)]
+    delta = self.dmp.diff_toDelta(diffs);
+    self.assertEqual('+' + a, delta);
+
+    # Convert delta string into a diff.
+    self.assertEqual(diffs, self.dmp.diff_fromDelta("", delta));
+
   def testDiffXIndex(self):
     # Translate a location in text1 to text2.
     self.assertEqual(5, self.dmp.diff_xIndex([(self.dmp.DIFF_DELETE, "a"), (self.dmp.DIFF_INSERT, "1234"), (self.dmp.DIFF_EQUAL, "xyz")], 2))