diff --git a/src/Utils/FindBreakingChanges.php b/src/Utils/FindBreakingChanges.php
index 0894f0c..7864508 100644
--- a/src/Utils/FindBreakingChanges.php
+++ b/src/Utils/FindBreakingChanges.php
@@ -85,7 +85,7 @@ class FindBreakingChanges
         foreach ($oldTypeMap as $typeName => $typeDefinition) {
             if (!isset($newTypeMap[$typeName])) {
                 $breakingChanges[] =
-                    ['type' => self::BREAKING_CHANGE_TYPE_REMOVED, 'description' => "${$typeName} was removed."];
+                    ['type' => self::BREAKING_CHANGE_TYPE_REMOVED, 'description' => "${typeName} was removed."];
             }
         }
 
diff --git a/tests/Utils/FindBreakingChangesTest.php b/tests/Utils/FindBreakingChangesTest.php
new file mode 100644
index 0000000..cb0c220
--- /dev/null
+++ b/tests/Utils/FindBreakingChangesTest.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ * FindBreakingChanges tests
+ */
+
+namespace GraphQL\Tests\Utils;
+
+use GraphQL\Type\Definition\ObjectType;
+use GraphQL\Type\Definition\Type;
+use GraphQL\Type\Schema;
+use GraphQL\Utils\FindBreakingChanges;
+
+class FindBreakingChangesTest extends \PHPUnit_Framework_TestCase
+{
+
+    public function setUp()
+    {
+        $this->queryType = new ObjectType([
+            'name' => 'Type1',
+            'fields' => [
+                'field1' => [
+                    'type' => Type::string()
+                ]
+            ]
+        ]);
+    }
+
+    public function testShouldDetectIfTypeWasRemoved()
+    {
+        $type1 = new ObjectType([
+            'name' => 'Type1',
+            'fields' => [
+                'field1' => ['type' => Type::string()],
+            ]
+        ]);
+        $type2 = new ObjectType([
+            'name' => 'Type2',
+            'fields' => [
+                'field1' => ['type' => Type::string()],
+            ]
+        ]);
+        $oldSchema = new Schema([
+            'query' => new ObjectType([
+                'name' => 'root',
+                'fields' => [
+                    'type1' => $type1,
+                    'type2' => $type2
+                ]
+            ])
+        ]);
+        $newSchema = new Schema([
+            'query' => new ObjectType([
+                'name' => 'root',
+                'fields' => [
+                    'type2' => $type2
+                ]
+            ])
+        ]);
+
+        $this->assertEquals(['type' => FindBreakingChanges::BREAKING_CHANGE_TYPE_REMOVED, 'description' => 'Type1 was removed.'],
+            FindBreakingChanges::findRemovedTypes($oldSchema, $newSchema)[0]
+        );
+
+        $this->assertEquals([], FindBreakingChanges::findRemovedTypes($oldSchema, $oldSchema));
+    }
+
+}
\ No newline at end of file