diff --git a/transport/src/main/java/io/netty/channel/nio/SelectedSelectionKeySet.java b/transport/src/main/java/io/netty/channel/nio/SelectedSelectionKeySet.java
index 452f0f0d77..0c7a1cc1f5 100644
--- a/transport/src/main/java/io/netty/channel/nio/SelectedSelectionKeySet.java
+++ b/transport/src/main/java/io/netty/channel/nio/SelectedSelectionKeySet.java
@@ -44,6 +44,16 @@ final class SelectedSelectionKeySet extends AbstractSet<SelectionKey> {
         return true;
     }
 
+    @Override
+    public boolean remove(Object o) {
+        return false;
+    }
+
+    @Override
+    public boolean contains(Object o) {
+        return false;
+    }
+
     @Override
     public int size() {
         return size;
diff --git a/transport/src/test/java/io/netty/channel/nio/SelectedSelectionKeySetTest.java b/transport/src/test/java/io/netty/channel/nio/SelectedSelectionKeySetTest.java
index 8350640692..88bb7b0a29 100644
--- a/transport/src/test/java/io/netty/channel/nio/SelectedSelectionKeySetTest.java
+++ b/transport/src/test/java/io/netty/channel/nio/SelectedSelectionKeySetTest.java
@@ -97,8 +97,8 @@ public class SelectedSelectionKeySetTest {
         SelectedSelectionKeySet set = new SelectedSelectionKeySet();
         assertTrue(set.add(mockKey));
         assertTrue(set.add(mockKey2));
-        assertTrue(set.contains(mockKey));
-        assertTrue(set.contains(mockKey2));
+        assertFalse(set.contains(mockKey));
+        assertFalse(set.contains(mockKey2));
         assertFalse(set.contains(mockKey3));
     }
 
@@ -106,12 +106,7 @@ public class SelectedSelectionKeySetTest {
     public void remove() {
         SelectedSelectionKeySet set = new SelectedSelectionKeySet();
         assertTrue(set.add(mockKey));
+        assertFalse(set.remove(mockKey));
         assertFalse(set.remove(mockKey2));
-        try {
-            set.remove(mockKey);
-            fail();
-        } catch (UnsupportedOperationException expected) {
-            // expected
-        }
     }
 }