diff --git a/maps/hashbidimap/serialization.go b/maps/hashbidimap/serialization.go
index 9f6247e..3db41d4 100644
--- a/maps/hashbidimap/serialization.go
+++ b/maps/hashbidimap/serialization.go
@@ -14,12 +14,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Map)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the map.
 func (m *Map) ToJSON() ([]byte, error) {
 	return m.forwardMap.ToJSON()
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the map from the input JSON representation.
 func (m *Map) FromJSON(data []byte) error {
 	elements := make(map[string]interface{})
 	err := json.Unmarshal(data, &elements)
diff --git a/maps/hashmap/serialization.go b/maps/hashmap/serialization.go
index b8e9026..b06eb7e 100644
--- a/maps/hashmap/serialization.go
+++ b/maps/hashmap/serialization.go
@@ -15,7 +15,7 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Map)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the map.
 func (m *Map) ToJSON() ([]byte, error) {
 	elements := make(map[string]interface{})
 	for key, value := range m.m {
@@ -24,7 +24,7 @@ func (m *Map) ToJSON() ([]byte, error) {
 	return json.Marshal(&elements)
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the map from the input JSON representation.
 func (m *Map) FromJSON(data []byte) error {
 	elements := make(map[string]interface{})
 	err := json.Unmarshal(data, &elements)
diff --git a/maps/treebidimap/serialization.go b/maps/treebidimap/serialization.go
index f9a7850..17204f9 100644
--- a/maps/treebidimap/serialization.go
+++ b/maps/treebidimap/serialization.go
@@ -15,7 +15,7 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Map)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the map.
 func (m *Map) ToJSON() ([]byte, error) {
 	elements := make(map[string]interface{})
 	it := m.Iterator()
@@ -25,7 +25,7 @@ func (m *Map) ToJSON() ([]byte, error) {
 	return json.Marshal(&elements)
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the map from the input JSON representation.
 func (m *Map) FromJSON(data []byte) error {
 	elements := make(map[string]interface{})
 	err := json.Unmarshal(data, &elements)
diff --git a/maps/treebidimap/treebidimap_test.go b/maps/treebidimap/treebidimap_test.go
index 0ef5165..bc7f4fa 100644
--- a/maps/treebidimap/treebidimap_test.go
+++ b/maps/treebidimap/treebidimap_test.go
@@ -473,35 +473,53 @@ func TestMapIteratorLast(t *testing.T) {
 	}
 }
 
+//noinspection GoBoolExpressions
 func TestMapSerialization(t *testing.T) {
-	m := NewWithStringComparators()
-	m.Put("a", "1")
-	m.Put("b", "2")
-	m.Put("c", "3")
-
-	var err error
-	assert := func() {
-		if actualValue := m.Keys(); actualValue[0].(string) != "a" || actualValue[1].(string) != "b" || actualValue[2].(string) != "c" {
-			t.Errorf("Got %v expected %v", actualValue, "[a,b,c]")
-		}
-		if actualValue := m.Values(); actualValue[0].(string) != "1" || actualValue[1].(string) != "2" || actualValue[2].(string) != "3" {
-			t.Errorf("Got %v expected %v", actualValue, "[1,2,3]")
+	for i := 0; i < 10; i++ {
+		original := NewWith(utils.StringComparator, utils.StringComparator)
+		original.Put("d", "4")
+		original.Put("e", "5")
+		original.Put("c", "3")
+		original.Put("b", "2")
+		original.Put("a", "1")
+
+		assert := func(m *Map, txt string) {
+			if actualValue := m.Keys(); false ||
+				actualValue[0].(string) != "a" ||
+				actualValue[1].(string) != "b" ||
+				actualValue[2].(string) != "c" ||
+				actualValue[3].(string) != "d" ||
+				actualValue[4].(string) != "e" {
+				t.Errorf("[%s] Got %v expected %v", txt, actualValue, "[a,b,c,d,e]")
+			}
+			if actualValue := m.Values(); false ||
+				actualValue[0].(string) != "1" ||
+				actualValue[1].(string) != "2" ||
+				actualValue[2].(string) != "3" ||
+				actualValue[3].(string) != "4" ||
+				actualValue[4].(string) != "5" {
+				t.Errorf("[%s] Got %v expected %v", txt, actualValue, "[1,2,3,4,5]")
+			}
+			if actualValue, expectedValue := m.Size(), 5; actualValue != expectedValue {
+				t.Errorf("[%s] Got %v expected %v", txt, actualValue, expectedValue)
+			}
 		}
-		if actualValue, expectedValue := m.Size(), 3; actualValue != expectedValue {
-			t.Errorf("Got %v expected %v", actualValue, expectedValue)
+
+		assert(original, "A")
+
+		serialized, err := original.ToJSON()
+		if err != nil {
+			t.Errorf("Got error %v", err)
 		}
+		assert(original, "B")
+
+		deserialized := NewWith(utils.StringComparator, utils.StringComparator)
+		err = deserialized.FromJSON(serialized)
 		if err != nil {
 			t.Errorf("Got error %v", err)
 		}
+		assert(deserialized, "C")
 	}
-
-	assert()
-
-	json, err := m.ToJSON()
-	assert()
-
-	err = m.FromJSON(json)
-	assert()
 }
 
 func benchmarkGet(b *testing.B, m *Map, size int) {
diff --git a/maps/treemap/serialization.go b/maps/treemap/serialization.go
index 25f4a6f..d856300 100644
--- a/maps/treemap/serialization.go
+++ b/maps/treemap/serialization.go
@@ -11,12 +11,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Map)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the map.
 func (m *Map) ToJSON() ([]byte, error) {
 	return m.tree.ToJSON()
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the map from the input JSON representation.
 func (m *Map) FromJSON(data []byte) error {
 	return m.tree.FromJSON(data)
 }
diff --git a/maps/treemap/treemap_test.go b/maps/treemap/treemap_test.go
index a73e873..d718c91 100644
--- a/maps/treemap/treemap_test.go
+++ b/maps/treemap/treemap_test.go
@@ -440,35 +440,53 @@ func TestMapIteratorLast(t *testing.T) {
 	}
 }
 
+//noinspection GoBoolExpressions
 func TestMapSerialization(t *testing.T) {
-	m := NewWithStringComparator()
-	m.Put("a", "1")
-	m.Put("b", "2")
-	m.Put("c", "3")
-
-	var err error
-	assert := func() {
-		if actualValue := m.Keys(); actualValue[0].(string) != "a" || actualValue[1].(string) != "b" || actualValue[2].(string) != "c" {
-			t.Errorf("Got %v expected %v", actualValue, "[a,b,c]")
-		}
-		if actualValue := m.Values(); actualValue[0].(string) != "1" || actualValue[1].(string) != "2" || actualValue[2].(string) != "3" {
-			t.Errorf("Got %v expected %v", actualValue, "[1,2,3]")
+	for i := 0; i < 10; i++ {
+		original := NewWithStringComparator()
+		original.Put("d", "4")
+		original.Put("e", "5")
+		original.Put("c", "3")
+		original.Put("b", "2")
+		original.Put("a", "1")
+
+		assert := func(m *Map, txt string) {
+			if actualValue := m.Keys(); false ||
+				actualValue[0].(string) != "a" ||
+				actualValue[1].(string) != "b" ||
+				actualValue[2].(string) != "c" ||
+				actualValue[3].(string) != "d" ||
+				actualValue[4].(string) != "e" {
+				t.Errorf("[%s] Got %v expected %v", txt, actualValue, "[a,b,c,d,e]")
+			}
+			if actualValue := m.Values(); false ||
+				actualValue[0].(string) != "1" ||
+				actualValue[1].(string) != "2" ||
+				actualValue[2].(string) != "3" ||
+				actualValue[3].(string) != "4" ||
+				actualValue[4].(string) != "5" {
+				t.Errorf("[%s] Got %v expected %v", txt, actualValue, "[1,2,3,4,5]")
+			}
+			if actualValue, expectedValue := m.Size(), 5; actualValue != expectedValue {
+				t.Errorf("[%s] Got %v expected %v", txt, actualValue, expectedValue)
+			}
 		}
-		if actualValue, expectedValue := m.Size(), 3; actualValue != expectedValue {
-			t.Errorf("Got %v expected %v", actualValue, expectedValue)
+
+		assert(original, "A")
+
+		serialized, err := original.ToJSON()
+		if err != nil {
+			t.Errorf("Got error %v", err)
 		}
+		assert(original, "B")
+
+		deserialized := NewWithStringComparator()
+		err = deserialized.FromJSON(serialized)
 		if err != nil {
 			t.Errorf("Got error %v", err)
 		}
+		assert(deserialized, "C")
 	}
-
-	assert()
-
-	json, err := m.ToJSON()
-	assert()
-
-	err = m.FromJSON(json)
-	assert()
 }
 
 func benchmarkGet(b *testing.B, m *Map, size int) {
diff --git a/sets/hashset/serialization.go b/sets/hashset/serialization.go
index af7bfe8..7b8506d 100644
--- a/sets/hashset/serialization.go
+++ b/sets/hashset/serialization.go
@@ -14,12 +14,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Set)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the set.
 func (set *Set) ToJSON() ([]byte, error) {
 	return json.Marshal(set.Values())
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the set from the input JSON representation.
 func (set *Set) FromJSON(data []byte) error {
 	elements := []interface{}{}
 	err := json.Unmarshal(data, &elements)
diff --git a/sets/linkedhashset/serialization.go b/sets/linkedhashset/serialization.go
index 806b908..7e7d291 100644
--- a/sets/linkedhashset/serialization.go
+++ b/sets/linkedhashset/serialization.go
@@ -14,12 +14,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Set)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the set.
 func (set *Set) ToJSON() ([]byte, error) {
 	return json.Marshal(set.Values())
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the set from the input JSON representation.
 func (set *Set) FromJSON(data []byte) error {
 	elements := []interface{}{}
 	err := json.Unmarshal(data, &elements)
diff --git a/sets/treeset/serialization.go b/sets/treeset/serialization.go
index 10b1599..a53bfcc 100644
--- a/sets/treeset/serialization.go
+++ b/sets/treeset/serialization.go
@@ -14,12 +14,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Set)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the set.
 func (set *Set) ToJSON() ([]byte, error) {
 	return json.Marshal(set.Values())
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the set from the input JSON representation.
 func (set *Set) FromJSON(data []byte) error {
 	elements := []interface{}{}
 	err := json.Unmarshal(data, &elements)
diff --git a/stacks/arraystack/serialization.go b/stacks/arraystack/serialization.go
index d1ad81d..c4ff549 100644
--- a/stacks/arraystack/serialization.go
+++ b/stacks/arraystack/serialization.go
@@ -11,12 +11,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Stack)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the stack.
 func (stack *Stack) ToJSON() ([]byte, error) {
 	return stack.list.ToJSON()
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the stack from the input JSON representation.
 func (stack *Stack) FromJSON(data []byte) error {
 	return stack.list.FromJSON(data)
 }
diff --git a/stacks/linkedliststack/serialization.go b/stacks/linkedliststack/serialization.go
index ac6a68c..63337a1 100644
--- a/stacks/linkedliststack/serialization.go
+++ b/stacks/linkedliststack/serialization.go
@@ -11,12 +11,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Stack)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the stack.
 func (stack *Stack) ToJSON() ([]byte, error) {
 	return stack.list.ToJSON()
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the stack from the input JSON representation.
 func (stack *Stack) FromJSON(data []byte) error {
 	return stack.list.FromJSON(data)
 }
diff --git a/trees/avltree/serialization.go b/trees/avltree/serialization.go
index 0630d87..363de7f 100644
--- a/trees/avltree/serialization.go
+++ b/trees/avltree/serialization.go
@@ -15,7 +15,7 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Tree)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the tree.
 func (tree *Tree) ToJSON() ([]byte, error) {
 	elements := make(map[string]interface{})
 	it := tree.Iterator()
@@ -25,7 +25,7 @@ func (tree *Tree) ToJSON() ([]byte, error) {
 	return json.Marshal(&elements)
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the tree from the input JSON representation.
 func (tree *Tree) FromJSON(data []byte) error {
 	elements := make(map[string]interface{})
 	err := json.Unmarshal(data, &elements)
diff --git a/trees/binaryheap/serialization.go b/trees/binaryheap/serialization.go
index 299319b..00d0c77 100644
--- a/trees/binaryheap/serialization.go
+++ b/trees/binaryheap/serialization.go
@@ -11,12 +11,12 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Heap)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the heap.
 func (heap *Heap) ToJSON() ([]byte, error) {
 	return heap.list.ToJSON()
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the heap from the input JSON representation.
 func (heap *Heap) FromJSON(data []byte) error {
 	return heap.list.FromJSON(data)
 }
diff --git a/trees/btree/serialization.go b/trees/btree/serialization.go
index 95c817e..4385167 100644
--- a/trees/btree/serialization.go
+++ b/trees/btree/serialization.go
@@ -15,7 +15,7 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Tree)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the tree.
 func (tree *Tree) ToJSON() ([]byte, error) {
 	elements := make(map[string]interface{})
 	it := tree.Iterator()
@@ -25,7 +25,7 @@ func (tree *Tree) ToJSON() ([]byte, error) {
 	return json.Marshal(&elements)
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the tree from the input JSON representation.
 func (tree *Tree) FromJSON(data []byte) error {
 	elements := make(map[string]interface{})
 	err := json.Unmarshal(data, &elements)
diff --git a/trees/redblacktree/serialization.go b/trees/redblacktree/serialization.go
index 7969fc5..a1b8a77 100644
--- a/trees/redblacktree/serialization.go
+++ b/trees/redblacktree/serialization.go
@@ -15,7 +15,7 @@ func assertSerializationImplementation() {
 	var _ containers.JSONDeserializer = (*Tree)(nil)
 }
 
-// ToJSON outputs the JSON representation of list's elements.
+// ToJSON outputs the JSON representation of the tree.
 func (tree *Tree) ToJSON() ([]byte, error) {
 	elements := make(map[string]interface{})
 	it := tree.Iterator()
@@ -25,7 +25,7 @@ func (tree *Tree) ToJSON() ([]byte, error) {
 	return json.Marshal(&elements)
 }
 
-// FromJSON populates list's elements from the input JSON representation.
+// FromJSON populates the tree from the input JSON representation.
 func (tree *Tree) FromJSON(data []byte) error {
 	elements := make(map[string]interface{})
 	err := json.Unmarshal(data, &elements)