diff --git a/src/main/java/org/cactoos/collection/CollectionEnvelope.java b/src/main/java/org/cactoos/collection/CollectionEnvelope.java
index 2052c53a0c..4c1a960299 100644
--- a/src/main/java/org/cactoos/collection/CollectionEnvelope.java
+++ b/src/main/java/org/cactoos/collection/CollectionEnvelope.java
@@ -29,7 +29,6 @@
 import org.cactoos.iterator.Immutable;
 import org.cactoos.scalar.And;
 import org.cactoos.scalar.Folded;
-import org.cactoos.scalar.InheritanceLevel;
 import org.cactoos.scalar.SumOfIntScalar;
 import org.cactoos.scalar.UncheckedScalar;
 
@@ -158,9 +157,7 @@ public final boolean equals(final Object other) {
         return new UncheckedScalar<>(
             new And(
                 () -> other != null,
-                () -> new InheritanceLevel(
-                    other.getClass(), CollectionEnvelope.class
-                ).value() > -1,
+                () -> Collection.class.isAssignableFrom(other.getClass()),
                 () -> {
                     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 1fe3369940..d8a5b5f8f9 100644
--- a/src/test/java/org/cactoos/collection/CollectionEnvelopeTest.java
+++ b/src/test/java/org/cactoos/collection/CollectionEnvelopeTest.java
@@ -23,6 +23,9 @@
  */
 package org.cactoos.collection;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
@@ -31,6 +34,7 @@
 import org.hamcrest.core.IsEqual;
 import org.hamcrest.core.IsNot;
 import org.junit.Test;
+import org.llorllale.cactoos.matchers.Assertion;
 
 /**
  * Test case for {@link CollectionEnvelope}.
@@ -144,6 +148,29 @@ public void differentHashCode() {
         );
     }
 
+    @Test
+    public void emptyCollectionEnvelopeShouldBeEqualToEmptyCollection() {
+        final CollectionEnvelope<String> envelope = new CollectionOf<>();
+        final Collection<String> collection = Collections.emptyList();
+        new Assertion<>(
+            "Empty envelope and collection should be equal",
+            () -> envelope,
+            new IsEqual<>(collection)
+        ).affirm();
+    }
+
+    @Test
+    public void collectionEnvelopeShouldBeEqualToCollection() {
+        final CollectionEnvelope<String> envelope = new CollectionOf<>("a");
+        final Collection<String> collection = new ArrayList<>(1);
+        collection.add("a");
+        new Assertion<>(
+            "Envelope and collection should be equal",
+            () -> envelope,
+            new IsEqual<>(collection)
+        ).affirm();
+    }
+
     /**
      * Custom collection.
      */