diff --git a/k9mail/src/test/java/com/fsck/k9/account/AccountCreatorTest.java b/k9mail/src/test/java/com/fsck/k9/account/AccountCreatorTest.java
index 5c67ae0e3..293eab532 100644
--- a/k9mail/src/test/java/com/fsck/k9/account/AccountCreatorTest.java
+++ b/k9mail/src/test/java/com/fsck/k9/account/AccountCreatorTest.java
@@ -32,6 +32,11 @@ public class AccountCreatorTest {
         assertEquals(DeletePolicy.ON_DELETE, result);
     }
 
+    @Test(expected= IllegalStateException.class)
+    public void getDefualtDeletePolicy_withSMTP_shouldFail(){
+        AccountCreator.getDefaultDeletePolicy(Type.SMTP);
+    }
+
     @Test
     public void getDefaultPort_withNoConnectionSecurityAndImap_shouldReturnDefaultPort() {
         int result = AccountCreator.getDefaultPort(ConnectionSecurity.NONE, Type.IMAP);
diff --git a/k9mail/src/test/java/com/fsck/k9/helper/UtilityTest.java b/k9mail/src/test/java/com/fsck/k9/helper/UtilityTest.java
index efc88aaa5..33eb3eeaa 100644
--- a/k9mail/src/test/java/com/fsck/k9/helper/UtilityTest.java
+++ b/k9mail/src/test/java/com/fsck/k9/helper/UtilityTest.java
@@ -4,6 +4,8 @@ package com.fsck.k9.helper;
 import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 public class UtilityTest {
 
@@ -41,4 +43,38 @@ public class UtilityTest {
 
         assertEquals("TestTest", result);
     }
+
+    @Test
+    public void arrayContains_withObject_ReturnsTrue(){
+        Object[] container = {10,20,30,40,50,60,71,80,90,91};
+        Object value = 10;
+        boolean result = Utility.arrayContains(container, value);
+
+        assertTrue(result);
+    }
+
+    @Test
+    public void arrayContains_withoutObject_ReturnsFalse(){
+        Object[] container = {10,20,30,40,50,60,71,80,90,91};
+        Object value = 11;
+        boolean result = Utility.arrayContains(container, value);
+
+        assertFalse(result);
+    }
+
+    @Test
+    public void arrayContainsAny_withObject_ReturnsTrue(){
+        Object[] container = {10,20,30,40,50,60,71,80,90,91};
+        boolean result = Utility.arrayContainsAny(container, 1, 2, 3, 10);
+
+        assertTrue(result);
+    }
+
+    @Test
+    public void arrayContainsAny_withoutObject_ReturnsFalse(){
+        Object[] container = {10,20,30,40,50,60,71,80,90,91};
+        boolean result = Utility.arrayContainsAny(container, 1, 2, 3, 4);
+
+        assertFalse(result);
+    }
 }