diff --git a/exercises/hamming/.meta/src/reference/kotlin/Hamming.kt b/exercises/hamming/.meta/src/reference/kotlin/Hamming.kt
index 8fdcf903..1edeb9ac 100644
--- a/exercises/hamming/.meta/src/reference/kotlin/Hamming.kt
+++ b/exercises/hamming/.meta/src/reference/kotlin/Hamming.kt
@@ -1,7 +1,7 @@
 object Hamming {
 
     fun compute(leftStrand: String, rightStrand: String): Int {
-        require(leftStrand.length == rightStrand.length, {"left and right strands must be of equal length."})
+        require(leftStrand.length == rightStrand.length, {"left and right strands must be of equal length"})
 
         val commonPairs = leftStrand.zip(rightStrand)
         return commonPairs.count { it.first != it.second }
diff --git a/exercises/hamming/.meta/version b/exercises/hamming/.meta/version
index 7ec1d6db..276cbf9e 100644
--- a/exercises/hamming/.meta/version
+++ b/exercises/hamming/.meta/version
@@ -1 +1 @@
-2.1.0
+2.3.0
diff --git a/exercises/hamming/src/test/kotlin/HammingTest.kt b/exercises/hamming/src/test/kotlin/HammingTest.kt
index d12712df..70adce2e 100644
--- a/exercises/hamming/src/test/kotlin/HammingTest.kt
+++ b/exercises/hamming/src/test/kotlin/HammingTest.kt
@@ -11,98 +11,49 @@ class HammingTest {
     var expectedException: ExpectedException = ExpectedException.none()
 
     @Test
-    fun noDistanceBetweenEmptyStrands() {
+    fun `empty strands`() {
         assertEquals(0, Hamming.compute("", ""))
     }
 
     @Ignore
     @Test
-    fun noDistanceBetweenShortIdenticalStrands() {
+    fun `single letter identical strands`() {
         assertEquals(0, Hamming.compute("A", "A"))
     }
 
     @Ignore
     @Test
-    fun noDistanceBetweenLongIdenticalStrands() {
-        assertEquals(0, Hamming.compute("GGACTGA", "GGACTGA"))
+    fun `single letter different strands`() {
+        assertEquals(1, Hamming.compute("G", "T"))
     }
 
     @Ignore
     @Test
-    fun completeDistanceInSingleNucleotideStrand() {
-        assertEquals(1, Hamming.compute("A", "G"))
+    fun `long identical strands`() {
+        assertEquals(0, Hamming.compute("GGACTGAAATCTG", "GGACTGAAATCTG"))
     }
 
     @Ignore
     @Test
-    fun completeDistanceInSmallStrand() {
-        assertEquals(2, Hamming.compute("AG", "CT"))
-    }
-
-    @Ignore
-    @Test
-    fun smallDistanceInSmallStrand() {
-        assertEquals(1, Hamming.compute("AT", "CT"))
-    }
-
-    @Ignore
-    @Test
-    fun smallDistanceInMediumStrand() {
-        assertEquals(1, Hamming.compute("GGACG", "GGTCG"))
-    }
-
-    @Ignore
-    @Test
-    fun smallDistanceInLongStrand() {
-        assertEquals(2, Hamming.compute("ACCAGGG", "ACTATGG"))
-    }
-
-    @Ignore
-    @Test
-    fun nonUniqueCharacterInFirstStrand() {
-        assertEquals(1, Hamming.compute("AAG", "AAA"))
-    }
-
-    @Ignore
-    @Test
-    fun nonUniqueCharacterInSecondStrand() {
-        assertEquals(1, Hamming.compute("AAA", "AAG"))
-    }
-
-    @Ignore
-    @Test
-    fun sameNucleotidesInDifferentPositions() {
-        assertEquals(2, Hamming.compute("TAG", "GAT"))
-    }
-
-    @Ignore
-    @Test
-    fun largeDistanceInPermutedStrand() {
-        assertEquals(4, Hamming.compute("GATACA", "GCATAA"))
-    }
-
-    @Ignore
-    @Test
-    fun largeDistanceInOffByOneStrand() {
+    fun `long different strands`() {
         assertEquals(9, Hamming.compute("GGACGGATTCTG", "AGGACGGATTCT"))
     }
 
     @Ignore
     @Test
-    fun validatesFirstStrandNotLonger() {
+    fun `disallow first strand longer`() {
         expectedException.expect(IllegalArgumentException::class.java)
-        expectedException.expectMessage("left and right strands must be of equal length.")
+        expectedException.expectMessage("left and right strands must be of equal length")
 
         Hamming.compute("AATG", "AAA")
     }
 
     @Ignore
     @Test
-    fun validatesSecondStrandNotLonger() {
+    fun `disallow second strand longer`() {
         expectedException.expect(IllegalArgumentException::class.java)
-        expectedException.expectMessage("left and right strands must be of equal length.")
+        expectedException.expectMessage("left and right strands must be of equal length")
 
         Hamming.compute("ATA", "AGTG")
     }
-
 }