diff --git a/test/form/side-effect-n/_config.js b/test/form/side-effect-n/_config.js
new file mode 100644
index 0000000..9896c14
--- /dev/null
+++ b/test/form/side-effect-n/_config.js
@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'detects side-effects in complex call expressions'
+};
diff --git a/test/form/side-effect-n/main.js b/test/form/side-effect-n/main.js
new file mode 100644
index 0000000..8610c02
--- /dev/null
+++ b/test/form/side-effect-n/main.js
@@ -0,0 +1,9 @@
+function foo () {
+	console.log( 'foo' );
+}
+
+function bar () {
+	console.log( 'bar' );
+}
+
+( Math.random() < 0.5 ? foo : bar )();
diff --git a/test/form/side-effect-o/_config.js b/test/form/side-effect-o/_config.js
new file mode 100644
index 0000000..9896c14
--- /dev/null
+++ b/test/form/side-effect-o/_config.js
@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'detects side-effects in complex call expressions'
+};
diff --git a/test/form/side-effect-o/main.js b/test/form/side-effect-o/main.js
new file mode 100644
index 0000000..621b55d
--- /dev/null
+++ b/test/form/side-effect-o/main.js
@@ -0,0 +1,13 @@
+function fn () {
+	return Math.random() < 0.5 ? foo : bar;
+}
+
+function foo () {
+	console.log( 'foo' );
+}
+
+function bar () {
+	console.log( 'bar' );
+}
+
+fn()();
diff --git a/test/function/iife-comments/_config.js b/test/function/iife-comments/_config.js
index 6b991a8..4b09ce9 100644
--- a/test/function/iife-comments/_config.js
+++ b/test/function/iife-comments/_config.js
@@ -5,4 +5,4 @@ module.exports = {
 	exports: function ( exports ) {
 		assert.equal( exports, 42 );
 	}
-}
+};