diff --git a/src/main/java/org/cactoos/collection/CollectionEnvelope.java b/src/main/java/org/cactoos/collection/CollectionEnvelope.java
index 3cdca5ca51..3561e0fe34 100644
--- a/src/main/java/org/cactoos/collection/CollectionEnvelope.java
+++ b/src/main/java/org/cactoos/collection/CollectionEnvelope.java
@@ -30,7 +30,6 @@
 import org.cactoos.scalar.And;
 import org.cactoos.scalar.Folded;
 import org.cactoos.scalar.InheritanceLevel;
-import org.cactoos.scalar.Or;
 import org.cactoos.scalar.SumOfIntScalar;
 import org.cactoos.scalar.UncheckedScalar;
 
@@ -151,14 +150,10 @@ public String toString() {
     public final boolean equals(final Object other) {
         return new UncheckedScalar<>(
             new And(
-                new Or(
-                    () -> new InheritanceLevel(
-                        other.getClass(), Collection.class
-                    ).value() > -1,
-                    () -> new InheritanceLevel(
-                        other.getClass(), CollectionEnvelope.class
-                    ).value() > -1
-                ),
+                () -> other != null,
+                () -> new InheritanceLevel(
+                    other.getClass(), CollectionEnvelope.class
+                ).value() > -1,
                 () -> {
                     final Collection<?> compared = (Collection<?>) other;
                     return this.size() == compared.size();
diff --git a/src/test/java/org/cactoos/collection/CollectionEnvelopeTest.java b/src/test/java/org/cactoos/collection/CollectionEnvelopeTest.java
index fa17779ff4..37287e9932 100644
--- a/src/test/java/org/cactoos/collection/CollectionEnvelopeTest.java
+++ b/src/test/java/org/cactoos/collection/CollectionEnvelopeTest.java
@@ -41,7 +41,7 @@
  *  Iterator for IterableEnvelope `iterator()` method.
  * @checkstyle JavadocMethodCheck (500 lines)
  */
-@SuppressWarnings("PMD.AvoidDuplicateLiterals")
+@SuppressWarnings({"PMD.AvoidDuplicateLiterals", "PMD.TooManyMethods"})
 public final class CollectionEnvelopeTest {
     @Test(expected = UnsupportedOperationException.class)
     public void returnsIteratorWithUnsupportedRemove() {
@@ -120,6 +120,15 @@ public void equalToEmptyCollection() {
         );
     }
 
+    @Test
+    public void notEqualToNull() {
+        MatcherAssert.assertThat(
+            "Empty collection equal to null",
+            new CollectionOf<>(),
+            new IsNot<>(new IsEqual<>(null))
+        );
+    }
+
     @Test
     public void hashCodeEqual() {
         MatcherAssert.assertThat(