diff --git a/test/Interface/GeneralTest.js b/test/Interface/GeneralTest.js
new file mode 100644
index 0000000..ee50cc9
--- /dev/null
+++ b/test/Interface/GeneralTest.js
@@ -0,0 +1,75 @@
+/**
+ * Tests interfaces
+ *
+ *  Copyright (C) 2010 Mike Gerwitz
+ *
+ *  This file is part of ease.js.
+ *
+ *  ease.js is free software: you can redistribute it and/or modify it under the
+ *  terms of the GNU Lesser General Public License as published by the Free
+ *  Software Foundation, either version 3 of the License, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @author  Mike Gerwitz
+ * @package test
+ */
+
+require( 'common' ).testCase(
+{
+    setUp: function()
+    {
+        this.FooType = this.require( 'interface' ).extend();
+    },
+
+
+    /**
+     * Interface.extend(), like Class.extend(), should result in a new
+     * interface.
+     */
+    'Interface extend method creates a new interface object': function()
+    {
+        this.assertOk(
+            ( typeof this.FooType === 'function' ),
+            "Interface extend method creates a new interface object"
+        );
+    },
+
+
+    /**
+     * Interfaces describe an API; they do not have any actual implementation.
+     * It does not make sense to instantiate them.
+     */
+    'Interfaces cannot be instantiated': function()
+    {
+        this.assertThrows( function()
+        {
+            new this.FooType();
+        }, Error, "Should not be able to instantiate interfaces" );
+    },
+
+
+    /**
+     * To prevent altering the interface after it is defined, the resulting
+     * object should be frozen, if supported by the environment.
+     */
+    'Generated interface should be frozen': function()
+    {
+        // only perform the assertion if supported by our environment
+        if ( Object.isFrozen )
+        {
+            this.assertEqual(
+                Object.isFrozen( this.FooType ),
+                true,
+                "Generated interface object should be frozen"
+            );
+        }
+    },
+} );
diff --git a/test/test-interface.js b/test/test-interface.js
deleted file mode 100644
index 0236940..0000000
--- a/test/test-interface.js
+++ /dev/null
@@ -1,53 +0,0 @@
-/**
- * Tests interfaces
- *
- *  Copyright (C) 2010 Mike Gerwitz
- *
- *  This file is part of ease.js.
- *
- *  ease.js is free software: you can redistribute it and/or modify it under the
- *  terms of the GNU Lesser General Public License as published by the Free
- *  Software Foundation, either version 3 of the License, or (at your option)
- *  any later version.
- *
- *  This program is distributed in the hope that it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU Lesser General Public License
- *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- * @author  Mike Gerwitz
- * @package test
- */
-
-var common         = require( './common' ),
-    assert         = require( 'assert' ),
-    Interface      = common.require( 'interface' ),
-    abstractMethod = Interface.abstractMethod;
-
-var FooType = Interface.extend();
-
-
-assert.ok(
-    ( FooType instanceof Function ),
-    "Interface extend method creates a new interface object"
-);
-
-assert.throws( function()
-{
-    new FooType();
-}, Error, "Interfaces cannot be instantiated" );
-
-
-// only perform check if supported by the engine
-if ( Object.isFrozen )
-{
-    assert.equal(
-        Object.isFrozen( FooType ),
-        true,
-        "Generated interface object should be frozen"
-    );
-}
-