diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/MyersDiffPerformanceTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/DiffPerformanceTest.java
similarity index 97%
rename from org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/MyersDiffPerformanceTest.java
rename to org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/DiffPerformanceTest.java
index a3f9c22e3..17c586f1e 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/MyersDiffPerformanceTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/DiffPerformanceTest.java
@@ -62,7 +62,7 @@
  * diffs between chunks of different length, measure the needed time and check
  * that time/(N*D) does not differ more than a certain factor.
  */
-public class MyersDiffPerformanceTest extends TestCase {
+public class DiffPerformanceTest extends TestCase {
 	private static final long longTaskBoundary = 5000000000L;
 
 	private static final int minCPUTimerTicks = 10;
@@ -186,7 +186,7 @@ private PerfData test(int characters) {
 		return ret;
 	}
 
-	private static class CharArray extends Sequence {
+	static class CharArray extends Sequence {
 		final char[] array;
 
 		public CharArray(String s) {
@@ -199,7 +199,7 @@ public int size() {
 		}
 	}
 
-	private static class CharCmp extends SequenceComparator<CharArray> {
+	static class CharCmp extends SequenceComparator<CharArray> {
 		@Override
 		public boolean equals(CharArray a, int ai, CharArray b, int bi) {
 			return a.array[ai] == b.array[bi];
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/MyersDiffTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/MyersDiffTest.java
index 4df2c5a40..896b0fbcc 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/MyersDiffTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/MyersDiffTest.java
@@ -43,9 +43,21 @@
 
 package org.eclipse.jgit.diff;
 
+import org.eclipse.jgit.diff.DiffPerformanceTest.CharArray;
+import org.eclipse.jgit.diff.DiffPerformanceTest.CharCmp;
+
 public class MyersDiffTest extends AbstractDiffTestCase {
 	@Override
 	protected DiffAlgorithm algorithm() {
 		return MyersDiff.INSTANCE;
 	}
+
+	public void testPerformanceTestDeltaLength() {
+		String a = DiffTestDataGenerator.generateSequence(40000, 971, 3);
+		String b = DiffTestDataGenerator.generateSequence(40000, 1621, 5);
+		CharArray ac = new CharArray(a);
+		CharArray bc = new CharArray(b);
+		EditList r = algorithm().diff(new CharCmp(), ac, bc);
+		assertEquals(131, r.size());
+	}
 }
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/PatienceDiffTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/PatienceDiffTest.java
index 67a4904c6..de88c2f87 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/PatienceDiffTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/diff/PatienceDiffTest.java
@@ -43,6 +43,9 @@
 
 package org.eclipse.jgit.diff;
 
+import org.eclipse.jgit.diff.DiffPerformanceTest.CharArray;
+import org.eclipse.jgit.diff.DiffPerformanceTest.CharCmp;
+
 public class PatienceDiffTest extends AbstractDiffTestCase {
 	@Override
 	protected DiffAlgorithm algorithm() {
@@ -71,29 +74,4 @@ public void testPerformanceTestDeltaLength() {
 		EditList r = algorithm().diff(new CharCmp(), ac, bc);
 		assertEquals(25, r.size());
 	}
-
-	private static class CharArray extends Sequence {
-		final char[] array;
-
-		public CharArray(String s) {
-			array = s.toCharArray();
-		}
-
-		@Override
-		public int size() {
-			return array.length;
-		}
-	}
-
-	private static class CharCmp extends SequenceComparator<CharArray> {
-		@Override
-		public boolean equals(CharArray a, int ai, CharArray b, int bi) {
-			return a.array[ai] == b.array[bi];
-		}
-
-		@Override
-		public int hash(CharArray seq, int ptr) {
-			return seq.array[ptr];
-		}
-	}
 }