diff --git a/src/Bundle.js b/src/Bundle.js
index 0a670d2..9f66026 100644
--- a/src/Bundle.js
+++ b/src/Bundle.js
@@ -82,14 +82,12 @@ export default class Bundle {
 				});
 
 				// mark statements that should appear in the bundle
-				const safe = !this.aggressive;
-
 				let settled = false;
 				while ( !settled ) {
 					settled = true;
 
 					this.modules.forEach( module => {
-						if ( module.run( safe || module === entryModule ) ) settled = false;
+						if ( module.run() ) settled = false;
 					});
 				}
 
diff --git a/src/Declaration.js b/src/Declaration.js
index 31f9345..76c7fa1 100644
--- a/src/Declaration.js
+++ b/src/Declaration.js
@@ -39,14 +39,14 @@ export default class Declaration {
 		return `exports.${this.name}`;
 	}
 
-	run ( strongDependencies, safe ) {
+	run ( strongDependencies ) {
 		if ( this.tested ) return this.hasSideEffects;
 		this.tested = true;
 
 		if ( !this.functionNode ) {
 			this.hasSideEffects = true; // err on the side of caution. TODO handle unambiguous `var x; x = y => z` cases
 		} else {
-			this.hasSideEffects = run( this.functionNode.body, this.functionNode._scope, this.statement, strongDependencies, false, safe );
+			this.hasSideEffects = run( this.functionNode.body, this.functionNode._scope, this.statement, strongDependencies, false );
 		}
 
 		return this.hasSideEffects;
@@ -93,13 +93,13 @@ export class SyntheticDefaultDeclaration {
 			this.original.render();
 	}
 
-	run ( strongDependencies, safe ) {
+	run ( strongDependencies ) {
 		if ( this.original ) {
-			return this.original.run( strongDependencies, safe );
+			return this.original.run( strongDependencies );
 		}
 
 		if ( /FunctionExpression/.test( this.node.declaration.type ) ) {
-			return run( this.node.declaration.body, this.statement.scope, this.statement, strongDependencies, false, safe );
+			return run( this.node.declaration.body, this.statement.scope, this.statement, strongDependencies, false );
 		}
 	}
 
@@ -224,8 +224,8 @@ export class ExternalDeclaration {
 		return es6 ? this.name : `${this.module.name}.${this.name}`;
 	}
 
-	run ( strongDependencies, safe ) {
-		return safe;
+	run ( strongDependencies ) {
+		return true;
 	}
 
 	use () {
diff --git a/src/utils/run.js b/src/utils/run.js
index 2d9ca6e..ac303f1 100644
--- a/src/utils/run.js
+++ b/src/utils/run.js
@@ -46,7 +46,7 @@ simdTypes.forEach( t => {
 
 
 
-export default function run ( node, scope, statement, strongDependencies, force, safe ) {
+export default function run ( node, scope, statement, strongDependencies, force ) {
 	let hasSideEffect = false;
 
 	walk( node, {
@@ -83,10 +83,10 @@ export default function run ( node, scope, statement, strongDependencies, force,
 					                    statement.module.trace( node.callee.name );
 
 					if ( declaration ) {
-						if ( declaration.run( strongDependencies, safe ) ) {
+						if ( declaration.run( strongDependencies ) ) {
 							hasSideEffect = true;
 						}
-					} else if ( safe && !pureFunctions[ node.callee.name ] ) {
+					} else if ( !pureFunctions[ node.callee.name ] ) {
 						hasSideEffect = true;
 					}
 				}
@@ -99,7 +99,7 @@ export default function run ( node, scope, statement, strongDependencies, force,
 						// TODO make pureFunctions configurable
 						const declaration = scope.findDeclaration( flattened.name ) || statement.module.trace( flattened.name );
 
-						if ( safe && ( !!declaration || !pureFunctions[ flattened.keypath ] ) ) {
+						if ( !!declaration || !pureFunctions[ flattened.keypath ] ) {
 							hasSideEffect = true;
 						}
 					} else {
@@ -110,7 +110,7 @@ export default function run ( node, scope, statement, strongDependencies, force,
 				}
 
 				// otherwise we're probably dealing with a function expression
-				else if ( run( node.callee, scope, statement, strongDependencies, true, safe ) ) {
+				else if ( run( node.callee, scope, statement, strongDependencies, true ) ) {
 					hasSideEffect = true;
 				}
 			}
@@ -126,7 +126,7 @@ export default function run ( node, scope, statement, strongDependencies, force,
 				} else {
 					declaration = statement.module.trace( subject.name );
 
-					if ( ( safe && ( !declaration || declaration.isExternal ) ) || declaration && declaration.isUsed ) {
+					if ( !declaration || declaration.isExternal || declaration.isUsed ) {
 						hasSideEffect = true;
 					}
 				}
diff --git a/test/form/aggressive/_config.js b/test/form/aggressive/_config.js
deleted file mode 100644
index bafb1e0..0000000
--- a/test/form/aggressive/_config.js
+++ /dev/null
@@ -1,6 +0,0 @@
-module.exports = {
-	description: 'ignores side-effects outside entry module in aggressive mode',
-	options: {
-		aggressive: true
-	}
-}
diff --git a/test/form/aggressive/_expected/amd.js b/test/form/aggressive/_expected/amd.js
deleted file mode 100644
index eac4f98..0000000
--- a/test/form/aggressive/_expected/amd.js
+++ /dev/null
@@ -1,9 +0,0 @@
-define(function () { 'use strict';
-
-	function foo () {
-		return 42;
-	}
-
-	assert.equal( foo(), 42 );
-
-});
\ No newline at end of file
diff --git a/test/form/aggressive/_expected/cjs.js b/test/form/aggressive/_expected/cjs.js
deleted file mode 100644
index a547fb6..0000000
--- a/test/form/aggressive/_expected/cjs.js
+++ /dev/null
@@ -1,7 +0,0 @@
-'use strict';
-
-function foo () {
-	return 42;
-}
-
-assert.equal( foo(), 42 );
\ No newline at end of file
diff --git a/test/form/aggressive/_expected/es6.js b/test/form/aggressive/_expected/es6.js
deleted file mode 100644
index f32ad00..0000000
--- a/test/form/aggressive/_expected/es6.js
+++ /dev/null
@@ -1,5 +0,0 @@
-function foo () {
-	return 42;
-}
-
-assert.equal( foo(), 42 );
\ No newline at end of file
diff --git a/test/form/aggressive/_expected/iife.js b/test/form/aggressive/_expected/iife.js
deleted file mode 100644
index 3ba1058..0000000
--- a/test/form/aggressive/_expected/iife.js
+++ /dev/null
@@ -1,9 +0,0 @@
-(function () { 'use strict';
-
-	function foo () {
-		return 42;
-	}
-
-	assert.equal( foo(), 42 );
-
-})();
\ No newline at end of file
diff --git a/test/form/aggressive/_expected/umd.js b/test/form/aggressive/_expected/umd.js
deleted file mode 100644
index 1eb1ef2..0000000
--- a/test/form/aggressive/_expected/umd.js
+++ /dev/null
@@ -1,13 +0,0 @@
-(function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
-	typeof define === 'function' && define.amd ? define(factory) :
-	factory();
-}(this, function () { 'use strict';
-
-	function foo () {
-		return 42;
-	}
-
-	assert.equal( foo(), 42 );
-
-}));
\ No newline at end of file
diff --git a/test/form/aggressive/foo.js b/test/form/aggressive/foo.js
deleted file mode 100644
index 16f57e9..0000000
--- a/test/form/aggressive/foo.js
+++ /dev/null
@@ -1,9 +0,0 @@
-function x () {
-	console.log( 'side-effect' );
-}
-
-x();
-
-export function foo () {
-	return 42;
-}
diff --git a/test/form/aggressive/main.js b/test/form/aggressive/main.js
deleted file mode 100644
index 66c6979..0000000
--- a/test/form/aggressive/main.js
+++ /dev/null
@@ -1,3 +0,0 @@
-import { foo } from './foo';
-
-assert.equal( foo(), 42 );
diff --git a/test/function/aggressive-mode/_config.js b/test/function/aggressive-mode/_config.js
deleted file mode 100644
index 7317b3f..0000000
--- a/test/function/aggressive-mode/_config.js
+++ /dev/null
@@ -1,8 +0,0 @@
-module.exports = {
-	// solo: true,
-	// show: true,
-	description: 'aggressive mode distinguishes between necessary and probably-not-necessary side-effects',
-	options: {
-		aggressive: true
-	}
-};
diff --git a/test/function/aggressive-mode/foo.js b/test/function/aggressive-mode/foo.js
deleted file mode 100644
index 15ed18e..0000000
--- a/test/function/aggressive-mode/foo.js
+++ /dev/null
@@ -1,11 +0,0 @@
-function Foo () {}
-
-Foo.prototype = {
-	answer: function () {
-		return 42;
-	}
-};
-
-export default function foo () {
-	return new Foo();
-}
diff --git a/test/function/aggressive-mode/main.js b/test/function/aggressive-mode/main.js
deleted file mode 100644
index 707c46a..0000000
--- a/test/function/aggressive-mode/main.js
+++ /dev/null
@@ -1,3 +0,0 @@
-import foo from './foo';
-
-assert.equal( foo().answer(), 42 );