diff --git a/test/form/exclude-unnecessary-modifications/_config.js b/test/form/exclude-unnecessary-modifications/_config.js
index 2b3de2b..c66ce85 100644
--- a/test/form/exclude-unnecessary-modifications/_config.js
+++ b/test/form/exclude-unnecessary-modifications/_config.js
@@ -1,3 +1,4 @@
 module.exports = {
-	description: 'statements that modify definitions within unused functions are excluded'
+	description: 'statements that modify definitions within unused functions are excluded',
+	solo: true
 };
diff --git a/test/form/exclude-unnecessary-modifications/_expected/amd.js b/test/form/exclude-unnecessary-modifications/_expected/amd.js
index 2cde378..84befa4 100644
--- a/test/form/exclude-unnecessary-modifications/_expected/amd.js
+++ b/test/form/exclude-unnecessary-modifications/_expected/amd.js
@@ -13,10 +13,16 @@ define(function () { 'use strict';
 		foo[ letter ] = i;
 	});
 
-	function mutate1 ( obj ) {
-		obj.mutated = 1;
+	function mutate1 () {
+		foo.mutated = 1;
 	}
 
+	({
+		mutate2: function () {
+			foo.mutated = 2;
+		}
+	}).mutate2();
+
 	console.log( foo );
 
 });
diff --git a/test/form/exclude-unnecessary-modifications/_expected/cjs.js b/test/form/exclude-unnecessary-modifications/_expected/cjs.js
index c440046..596c910 100644
--- a/test/form/exclude-unnecessary-modifications/_expected/cjs.js
+++ b/test/form/exclude-unnecessary-modifications/_expected/cjs.js
@@ -13,8 +13,14 @@ mutate1( foo );
 	foo[ letter ] = i;
 });
 
-function mutate1 ( obj ) {
-	obj.mutated = 1;
+function mutate1 () {
+	foo.mutated = 1;
 }
 
+({
+	mutate2: function () {
+		foo.mutated = 2;
+	}
+}).mutate2();
+
 console.log( foo );
diff --git a/test/form/exclude-unnecessary-modifications/_expected/es6.js b/test/form/exclude-unnecessary-modifications/_expected/es6.js
index 57365ac..a88d21e 100644
--- a/test/form/exclude-unnecessary-modifications/_expected/es6.js
+++ b/test/form/exclude-unnecessary-modifications/_expected/es6.js
@@ -11,8 +11,14 @@ mutate1( foo );
 	foo[ letter ] = i;
 });
 
-function mutate1 ( obj ) {
-	obj.mutated = 1;
+function mutate1 () {
+	foo.mutated = 1;
 }
 
+({
+	mutate2: function () {
+		foo.mutated = 2;
+	}
+}).mutate2();
+
 console.log( foo );
diff --git a/test/form/exclude-unnecessary-modifications/_expected/iife.js b/test/form/exclude-unnecessary-modifications/_expected/iife.js
index 3063464..0fd4c40 100644
--- a/test/form/exclude-unnecessary-modifications/_expected/iife.js
+++ b/test/form/exclude-unnecessary-modifications/_expected/iife.js
@@ -13,10 +13,16 @@
 		foo[ letter ] = i;
 	});
 
-	function mutate1 ( obj ) {
-		obj.mutated = 1;
+	function mutate1 () {
+		foo.mutated = 1;
 	}
 
+	({
+		mutate2: function () {
+			foo.mutated = 2;
+		}
+	}).mutate2();
+
 	console.log( foo );
 
 })();
diff --git a/test/form/exclude-unnecessary-modifications/_expected/umd.js b/test/form/exclude-unnecessary-modifications/_expected/umd.js
index 55207a5..1c2bb78 100644
--- a/test/form/exclude-unnecessary-modifications/_expected/umd.js
+++ b/test/form/exclude-unnecessary-modifications/_expected/umd.js
@@ -17,10 +17,16 @@
 		foo[ letter ] = i;
 	});
 
-	function mutate1 ( obj ) {
-		obj.mutated = 1;
+	function mutate1 () {
+		foo.mutated = 1;
 	}
 
+	({
+		mutate2: function () {
+			foo.mutated = 2;
+		}
+	}).mutate2();
+
 	console.log( foo );
 
 }));
diff --git a/test/form/exclude-unnecessary-modifications/foo.js b/test/form/exclude-unnecessary-modifications/foo.js
index 268c0b9..71e1e93 100644
--- a/test/form/exclude-unnecessary-modifications/foo.js
+++ b/test/form/exclude-unnecessary-modifications/foo.js
@@ -11,10 +11,16 @@ mutate1( foo );
 	foo[ letter ] = i;
 });
 
-function mutate1 ( obj ) {
-	obj.mutated = 1;
+function mutate1 () {
+	foo.mutated = 1;
 }
 
+({
+	mutate2: function () {
+		foo.mutated = 2;
+	}
+}).mutate2();
+
 // should be excluded
 var mutate2 = function () {
 	foo.mutated = 2;