diff --git a/android/guava-tests/test/com/google/common/base/CharMatcherTest.java b/android/guava-tests/test/com/google/common/base/CharMatcherTest.java
index 7bc7d6ab781f..d78327ef08dc 100644
--- a/android/guava-tests/test/com/google/common/base/CharMatcherTest.java
+++ b/android/guava-tests/test/com/google/common/base/CharMatcherTest.java
@@ -652,6 +652,14 @@ public void testReplaceFrom() {
     assertEquals("12 > 5", is('>').replaceFrom("12 > 5", ">"));
   }
 
+  public void testRetainFrom() {
+    assertEquals("aaa", is('a').retainFrom("bazaar"));
+    assertEquals("z", is('z').retainFrom("bazaar"));
+    assertEquals("!", is('!').retainFrom("!@#$%^&*()-="));
+    assertEquals("", is('x').retainFrom("bazaar"));
+    assertEquals("", is('a').retainFrom(""));
+  }
+
   public void testPrecomputedOptimizations() {
     // These are testing behavior that's never promised by the API.
     // Some matchers are so efficient that it is a waste of effort to
diff --git a/guava-tests/test/com/google/common/base/CharMatcherTest.java b/guava-tests/test/com/google/common/base/CharMatcherTest.java
index 7bc7d6ab781f..d78327ef08dc 100644
--- a/guava-tests/test/com/google/common/base/CharMatcherTest.java
+++ b/guava-tests/test/com/google/common/base/CharMatcherTest.java
@@ -652,6 +652,14 @@ public void testReplaceFrom() {
     assertEquals("12 > 5", is('>').replaceFrom("12 > 5", ">"));
   }
 
+  public void testRetainFrom() {
+    assertEquals("aaa", is('a').retainFrom("bazaar"));
+    assertEquals("z", is('z').retainFrom("bazaar"));
+    assertEquals("!", is('!').retainFrom("!@#$%^&*()-="));
+    assertEquals("", is('x').retainFrom("bazaar"));
+    assertEquals("", is('a').retainFrom(""));
+  }
+
   public void testPrecomputedOptimizations() {
     // These are testing behavior that's never promised by the API.
     // Some matchers are so efficient that it is a waste of effort to