diff --git a/app/src/test/java/com/wbrawner/simplemarkdown/ReadabilityTest.java b/app/src/test/java/com/wbrawner/simplemarkdown/ReadabilityTest.java
deleted file mode 100644
index 3f73e04..0000000
--- a/app/src/test/java/com/wbrawner/simplemarkdown/ReadabilityTest.java
+++ /dev/null
@@ -1,52 +0,0 @@
-package com.wbrawner.simplemarkdown;
-
-import com.wbrawner.simplemarkdown.model.Readability;
-import com.wbrawner.simplemarkdown.model.Sentence;
-import eu.crydee.syllablecounter.SyllableCounter;
-import org.junit.Test;
-
-import java.util.List;
-
-import static org.junit.Assert.assertEquals;
-
-public class ReadabilityTest {
-
-    @Test
-    public void break_content_into_sentances() {
-        SyllableCounter sc = new SyllableCounter();
-        assertEquals(4, sc.count("facility"));
-    }
-
-    @Test
-    public void can_break_text_into_sentences_with_indexes(){
-        String content = "Hop on pop. I am a fish. This is a test.";
-        Readability readability = new Readability(content);
-        List<Sentence> sentenceList = readability.sentences();
-
-        assertEquals(3, sentenceList.size());
-
-        Sentence hopOnPop = sentenceList.get(0);
-        assertEquals(hopOnPop.toString(), "Hop on pop");
-        assertEquals(0, hopOnPop.start());
-        assertEquals(10, hopOnPop.end());
-
-        Sentence iAmAFish = sentenceList.get(1);
-        assertEquals(iAmAFish.toString(), "I am a fish");
-        assertEquals(12, iAmAFish.start());
-        assertEquals(23, iAmAFish.end());
-
-        Sentence thisIsATest = sentenceList.get(2);
-        assertEquals(thisIsATest.toString(), "This is a test");
-        assertEquals(25, thisIsATest.start());
-        assertEquals(39, thisIsATest.end());
-    }
-
-
-    @Test
-    public void get_syllable_count_for_sentence(){
-        assertEquals(8, new Sentence("This is the song that never ends").syllableCount());
-        assertEquals(10, new Sentence("facility facility downing").syllableCount());
-    }
-
-
-}
diff --git a/app/src/test/java/com/wbrawner/simplemarkdown/ReadabilityTest.kt b/app/src/test/java/com/wbrawner/simplemarkdown/ReadabilityTest.kt
new file mode 100644
index 0000000..9602ddb
--- /dev/null
+++ b/app/src/test/java/com/wbrawner/simplemarkdown/ReadabilityTest.kt
@@ -0,0 +1,49 @@
+package com.wbrawner.simplemarkdown
+
+import com.wbrawner.simplemarkdown.model.Readability
+import com.wbrawner.simplemarkdown.model.Sentence
+import eu.crydee.syllablecounter.SyllableCounter
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class ReadabilityTest {
+
+    @Test
+    fun break_content_into_sentances() {
+        val sc = SyllableCounter()
+        assertEquals(4, sc.count("facility").toLong())
+    }
+
+    @Test
+    fun can_break_text_into_sentences_with_indexes() {
+        val content = "Hop on pop. I am a fish. This is a test."
+        val readability = Readability(content)
+        val sentenceList = readability.sentences()
+
+        assertEquals(3, sentenceList.size.toLong())
+
+        val hopOnPop = sentenceList[0]
+        assertEquals(hopOnPop.toString(), "Hop on pop")
+        assertEquals(0, hopOnPop.start().toLong())
+        assertEquals(10, hopOnPop.end().toLong())
+
+        val iAmAFish = sentenceList[1]
+        assertEquals(iAmAFish.toString(), "I am a fish")
+        assertEquals(12, iAmAFish.start().toLong())
+        assertEquals(23, iAmAFish.end().toLong())
+
+        val thisIsATest = sentenceList[2]
+        assertEquals(thisIsATest.toString(), "This is a test")
+        assertEquals(25, thisIsATest.start().toLong())
+        assertEquals(39, thisIsATest.end().toLong())
+    }
+
+
+    @Test
+    fun get_syllable_count_for_sentence() {
+        assertEquals(8, Sentence("This is the song that never ends").syllableCount().toLong())
+        assertEquals(10, Sentence("facility facility downing").syllableCount().toLong())
+    }
+
+
+}