diff --git a/test/form/side-effect-m/_config.js b/test/form/side-effect-m/_config.js
new file mode 100644
index 0000000..5fc4d8c
--- /dev/null
+++ b/test/form/side-effect-m/_config.js
@@ -0,0 +1,4 @@
+module.exports = {
+	solo: true,
+	description: 'detects side-effects with cyclical dependencies'
+};
diff --git a/test/form/side-effect-m/_expected/amd.js b/test/form/side-effect-m/_expected/amd.js
new file mode 100644
index 0000000..763d466
--- /dev/null
+++ b/test/form/side-effect-m/_expected/amd.js
@@ -0,0 +1,21 @@
+define(function () { 'use strict';
+
+	function odd ( n ) {
+		return n !== 0 && even( n - 1 );
+	}
+
+	var counter = 0;
+
+	// This should be in the output
+	export var foo = odd( 12 );
+
+	function even ( n ) {
+		alert( counter++ )
+		return n === 0 || odd( n - 1 );
+	}
+
+	console.log( even( 5 ) );
+
+	console.log( counter );
+
+});
diff --git a/test/form/side-effect-m/_expected/cjs.js b/test/form/side-effect-m/_expected/cjs.js
new file mode 100644
index 0000000..8aeebd5
--- /dev/null
+++ b/test/form/side-effect-m/_expected/cjs.js
@@ -0,0 +1,19 @@
+'use strict';
+
+function odd ( n ) {
+	return n !== 0 && even( n - 1 );
+}
+
+var counter = 0;
+
+// This should be in the output
+export var foo = odd( 12 );
+
+function even ( n ) {
+	alert( counter++ )
+	return n === 0 || odd( n - 1 );
+}
+
+console.log( even( 5 ) );
+
+console.log( counter );
diff --git a/test/form/side-effect-m/_expected/es6.js b/test/form/side-effect-m/_expected/es6.js
new file mode 100644
index 0000000..f1bc219
--- /dev/null
+++ b/test/form/side-effect-m/_expected/es6.js
@@ -0,0 +1,17 @@
+function odd ( n ) {
+	return n !== 0 && even( n - 1 );
+}
+
+var counter = 0;
+
+// This should be in the output
+export var foo = odd( 12 );
+
+function even ( n ) {
+	alert( counter++ )
+	return n === 0 || odd( n - 1 );
+}
+
+console.log( even( 5 ) );
+
+console.log( counter );
diff --git a/test/form/side-effect-m/_expected/iife.js b/test/form/side-effect-m/_expected/iife.js
new file mode 100644
index 0000000..b507ec9
--- /dev/null
+++ b/test/form/side-effect-m/_expected/iife.js
@@ -0,0 +1,21 @@
+(function () { 'use strict';
+
+	function odd ( n ) {
+		return n !== 0 && even( n - 1 );
+	}
+
+	var counter = 0;
+
+	// This should be in the output
+	export var foo = odd( 12 );
+
+	function even ( n ) {
+		alert( counter++ )
+		return n === 0 || odd( n - 1 );
+	}
+
+	console.log( even( 5 ) );
+
+	console.log( counter );
+
+})();
diff --git a/test/form/side-effect-m/_expected/umd.js b/test/form/side-effect-m/_expected/umd.js
new file mode 100644
index 0000000..45f0a07
--- /dev/null
+++ b/test/form/side-effect-m/_expected/umd.js
@@ -0,0 +1,25 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(factory());
+}(this, function () { 'use strict';
+
+	function odd ( n ) {
+		return n !== 0 && even( n - 1 );
+	}
+
+	var counter = 0;
+
+	// This should be in the output
+	export var foo = odd( 12 );
+
+	function even ( n ) {
+		alert( counter++ )
+		return n === 0 || odd( n - 1 );
+	}
+
+	console.log( even( 5 ) );
+
+	console.log( counter );
+
+}));
diff --git a/test/form/side-effect-m/even.js b/test/form/side-effect-m/even.js
new file mode 100644
index 0000000..5b16c01
--- /dev/null
+++ b/test/form/side-effect-m/even.js
@@ -0,0 +1,11 @@
+import { odd } from './odd.js'
+
+export var counter = 0;
+
+// This should be in the output
+export var foo = odd( 12 );
+
+export function even ( n ) {
+	alert( counter++ )
+	return n === 0 || odd( n - 1 );
+}
diff --git a/test/form/side-effect-m/main.js b/test/form/side-effect-m/main.js
new file mode 100644
index 0000000..a7adf02
--- /dev/null
+++ b/test/form/side-effect-m/main.js
@@ -0,0 +1,5 @@
+import { counter, even } from './even.js';
+
+console.log( even( 5 ) );
+
+console.log( counter );
diff --git a/test/form/side-effect-m/odd.js b/test/form/side-effect-m/odd.js
new file mode 100644
index 0000000..0293a7b
--- /dev/null
+++ b/test/form/side-effect-m/odd.js
@@ -0,0 +1,5 @@
+import { even } from './even.js';
+
+export function odd ( n ) {
+	return n !== 0 && even( n - 1 );
+}