1 files changed, 9 insertions, 0 deletions
diff --git a/test/ReaderTest.php b/test/ReaderTest.php
index e16610c..d650c51 100644
--- a/test/ReaderTest.php
+++ b/test/ReaderTest.php
@@ -216,6 +216,15 @@ class ReaderTest extends AbstractTestCase
     }
 
     /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testFetchAssocThrowsExceptionWithNonUniqueAssocKeys()
+    {
+        $keys = ['firstname', 'lastname', 'firstname'];
+        $this->csv->fetchAssoc($keys);
+    }
+
+    /**
      * @param  $expected
      * @dataProvider validBOMSequences
      */