diff --git a/src/test/java/org/apache/commons/lang3/ArrayUtilsTest.java b/src/test/java/org/apache/commons/lang3/ArrayUtilsTest.java
index 8659abc88..3b010ee13 100644
--- a/src/test/java/org/apache/commons/lang3/ArrayUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/ArrayUtilsTest.java
@@ -253,14 +253,14 @@ public class ArrayUtilsTest extends AbstractLangTest {
     @Test
     public void testContainsAny() {
         final Object[] array = {"0", "1", "2", "3", null, "0"};
-        assertFalse(ArrayUtils.containsAny(null, null));
+        assertFalse(ArrayUtils.containsAny(null, (Object) null));
         assertFalse(ArrayUtils.containsAny(null, "1"));
         assertTrue(ArrayUtils.containsAny(array, "0"));
         assertTrue(ArrayUtils.containsAny(array, "1"));
         assertTrue(ArrayUtils.containsAny(array, "2"));
         assertTrue(ArrayUtils.containsAny(array, "3"));
         assertFalse(ArrayUtils.containsAny(array, "notInArray"));
-        assertTrue(ArrayUtils.containsAny(array, new String[] {null}));
+        assertTrue(ArrayUtils.containsAny(array, (Object) new String[] { null }));
     }
 
     @Test
diff --git a/src/test/java/org/apache/commons/lang3/StringUtilsTest.java b/src/test/java/org/apache/commons/lang3/StringUtilsTest.java
index 7de206358..e1102f74e 100644
--- a/src/test/java/org/apache/commons/lang3/StringUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/StringUtilsTest.java
@@ -438,7 +438,7 @@ public class StringUtilsTest extends AbstractLangTest {
         assertNull(StringUtils.appendIfMissing(null, null, (CharSequence[]) null), "appendIfMissing(null,null,null)");
         assertEquals("abc", StringUtils.appendIfMissing("abc", null, (CharSequence[]) null), "appendIfMissing(abc,null,null)");
         assertEquals("xyz", StringUtils.appendIfMissing("", "xyz", (CharSequence[]) null), "appendIfMissing(\"\",xyz,null))");
-        assertEquals("abcxyz", StringUtils.appendIfMissing("abc", "xyz", null), "appendIfMissing(abc,xyz,{null})");
+        assertEquals("abcxyz", StringUtils.appendIfMissing("abc", "xyz", (CharSequence) null), "appendIfMissing(abc,xyz,{null})");
         assertEquals("abc", StringUtils.appendIfMissing("abc", "xyz", ""), "appendIfMissing(abc,xyz,\"\")");
         assertEquals("abcxyz", StringUtils.appendIfMissing("abc", "xyz", "mno"), "appendIfMissing(abc,xyz,mno)");
         assertEquals("abcxyz", StringUtils.appendIfMissing("abcxyz", "xyz", "mno"), "appendIfMissing(abcxyz,xyz,mno)");
@@ -462,7 +462,7 @@ public class StringUtilsTest extends AbstractLangTest {
         assertNull(StringUtils.appendIfMissingIgnoreCase(null, null, (CharSequence[]) null), "appendIfMissingIgnoreCase(null,null,null)");
         assertEquals("abc", StringUtils.appendIfMissingIgnoreCase("abc", null, (CharSequence[]) null), "appendIfMissingIgnoreCase(abc,null,null)");
         assertEquals("xyz", StringUtils.appendIfMissingIgnoreCase("", "xyz", (CharSequence[]) null), "appendIfMissingIgnoreCase(\"\",xyz,null)");
-        assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abc", "xyz", null), "appendIfMissingIgnoreCase(abc,xyz,{null})");
+        assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abc", "xyz", (CharSequence) null), "appendIfMissingIgnoreCase(abc,xyz,{null})");
         assertEquals("abc", StringUtils.appendIfMissingIgnoreCase("abc", "xyz", ""), "appendIfMissingIgnoreCase(abc,xyz,\"\")");
         assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abc", "xyz", "mno"), "appendIfMissingIgnoreCase(abc,xyz,mno)");
         assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abcxyz", "xyz", "mno"), "appendIfMissingIgnoreCase(abcxyz,xyz,mno)");
@@ -1603,7 +1603,7 @@ public class StringUtilsTest extends AbstractLangTest {
         assertNull(StringUtils.prependIfMissing(null, null, (CharSequence[]) null), "prependIfMissing(null,null null)");
         assertEquals("abc", StringUtils.prependIfMissing("abc", null, (CharSequence[]) null), "prependIfMissing(abc,null,null)");
         assertEquals("xyz", StringUtils.prependIfMissing("", "xyz", (CharSequence[]) null), "prependIfMissing(\"\",xyz,null)");
-        assertEquals("xyzabc", StringUtils.prependIfMissing("abc", "xyz", null), "prependIfMissing(abc,xyz,{null})");
+        assertEquals("xyzabc", StringUtils.prependIfMissing("abc", "xyz", (CharSequence) null), "prependIfMissing(abc,xyz,{null})");
         assertEquals("abc", StringUtils.prependIfMissing("abc", "xyz", ""), "prependIfMissing(abc,xyz,\"\")");
         assertEquals("xyzabc", StringUtils.prependIfMissing("abc", "xyz", "mno"), "prependIfMissing(abc,xyz,mno)");
         assertEquals("xyzabc", StringUtils.prependIfMissing("xyzabc", "xyz", "mno"), "prependIfMissing(xyzabc,xyz,mno)");
@@ -1627,7 +1627,7 @@ public class StringUtilsTest extends AbstractLangTest {
         assertNull(StringUtils.prependIfMissingIgnoreCase(null, null, (CharSequence[]) null), "prependIfMissingIgnoreCase(null,null null)");
         assertEquals("abc", StringUtils.prependIfMissingIgnoreCase("abc", null, (CharSequence[]) null), "prependIfMissingIgnoreCase(abc,null,null)");
         assertEquals("xyz", StringUtils.prependIfMissingIgnoreCase("", "xyz", (CharSequence[]) null), "prependIfMissingIgnoreCase(\"\",xyz,null)");
-        assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz", null), "prependIfMissingIgnoreCase(abc,xyz,{null})");
+        assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz", (CharSequence) null), "prependIfMissingIgnoreCase(abc,xyz,{null})");
         assertEquals("abc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz", ""), "prependIfMissingIgnoreCase(abc,xyz,\"\")");
         assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz", "mno"), "prependIfMissingIgnoreCase(abc,xyz,mno)");
         assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("xyzabc", "xyz", "mno"), "prependIfMissingIgnoreCase(xyzabc,xyz,mno)");