diff --git a/test/merge-all.ts b/test/merge-all.ts
index 4d0405b..99b4821 100644
--- a/test/merge-all.ts
+++ b/test/merge-all.ts
@@ -60,7 +60,7 @@ test(`invoke merge on every item in array with clone should clone all elements`,
 	t.end()
 })
 
-test(`invoke merge on every item in array clone=false should not clone all elements`, (t) => {
+test(`invoke merge on every item in array with clone=false should not clone all elements`, (t) => {
 	const firstObject = { a: { d: 123 } }
 	const secondObject = { b: { e: true } }
 	const thirdObject = { c: { f: `string` } }
@@ -74,13 +74,12 @@ test(`invoke merge on every item in array clone=false should not clone all eleme
 	t.end()
 })
 
-
-test(`invoke merge on every item in array without clone should clone all elements`, (t) => {
+test(`invoke merge on every item in array with clone=true should clone all elements`, (t) => {
 	const firstObject = { a: { d: 123 } }
 	const secondObject = { b: { e: true } }
 	const thirdObject = { c: { f: `string` } }
 
-	const mergedWithoutClone = mergeAll([ firstObject, secondObject, thirdObject ])
+	const mergedWithoutClone = mergeAll([ firstObject, secondObject, thirdObject ], { clone: true })
 
 	t.notEqual(mergedWithoutClone.a, firstObject.a)
 	t.notEqual(mergedWithoutClone.b, secondObject.b)
diff --git a/test/merge-plain-objects.ts b/test/merge-plain-objects.ts
index c1c4964..0efd771 100644
--- a/test/merge-plain-objects.ts
+++ b/test/merge-plain-objects.ts
@@ -6,12 +6,12 @@ test(`plain objects are merged by default`, (t) => {
 		newObject: new Object(),
 		objectLiteral: { a: 123 },
 	}
-	const output = merge({}, input)
+	const output = merge({}, input, { clone: false })
 
 	t.deepEqual(output.newObject, input.newObject)
-	t.notEqual(output.newObject, input.newObject)
+	t.equal(output.newObject, input.newObject)
 	t.deepEqual(output.objectLiteral, input.objectLiteral)
-	t.notEqual(output.objectLiteral, input.objectLiteral)
+	t.equal(output.objectLiteral, input.objectLiteral)
 
 	t.end()
 })
diff --git a/test/merge.ts b/test/merge.ts
index 50b1d5e..3b1bd36 100644
--- a/test/merge.ts
+++ b/test/merge.ts
@@ -80,8 +80,8 @@ test(`replace simple key with nested object in target`, (t) => {
 		key2: `value2`,
 	}
 
-	t.deepEqual(target, { key1: `value1`, key2: `value2` })
-	t.deepEqual(merge(target, src), expected)
+	t.deepEqual(merge(target, src, { clone: true }), expected)
+	t.deepEqual(merge(target, src, { clone: false }), expected)
 	t.end()
 })
 
@@ -139,7 +139,7 @@ test(`should clone source and target`, (t) => {
 	t.end()
 })
 
-test(`should clone source and target`, (t) => {
+test(`should clone source and target if specified`, (t) => {
 	const src = {
 		b: {
 			c: `foo`,
@@ -152,7 +152,7 @@ test(`should clone source and target`, (t) => {
 		},
 	}
 
-	const merged = merge(target, src)
+	const merged = merge(target, src, { clone: true })
 	t.notEqual(merged.a, target.a)
 	t.notEqual(merged.b, src.b)
 
diff --git a/test/prototype-poisoning.ts b/test/prototype-poisoning.ts
index 95f580e..cd1379c 100644
--- a/test/prototype-poisoning.ts
+++ b/test/prototype-poisoning.ts
@@ -29,7 +29,7 @@ test(`merging objects with plain and non-plain properties`, (t) => {
 		[plainSymbolKey]: `qux`,
 	}
 
-	const mergedObject = merge(target, source)
+	const mergedObject = merge(target, source, { clone: true })
 	t.equal(undefined, mergedObject.parentKey, `inherited properties of target should be removed, not merged or ignored`)
 	t.equal(`bar`, mergedObject.plainKey, `enumerable own properties of target should be merged`)
 	t.equal(`baz`, mergedObject.newKey, `properties not yet on target should be merged`)
@@ -73,6 +73,6 @@ test(`merging objects with null prototype`, (t) => {
 		},
 	}
 
-	t.deepEqual(expected, merge(target, source))
+	t.deepEqual(merge(target, source, { clone: true }), expected)
 	t.end()
 })