diff --git a/tests/Language/LexerTest.php b/tests/Language/LexerTest.php
index e73cf62..946c39a 100644
--- a/tests/Language/LexerTest.php
+++ b/tests/Language/LexerTest.php
@@ -423,6 +423,7 @@ class LexerTest extends \PHPUnit_Framework_TestCase
             [ '00', "Syntax Error GraphQL (1:2) Invalid number, unexpected digit after 0: \"0\"\n\n1: 00\n    ^\n"],
             [ '+1', "Syntax Error GraphQL (1:1) Cannot parse the unexpected character \"+\".\n\n1: +1\n   ^\n"],
             [ '1.', "Syntax Error GraphQL (1:3) Invalid number, expected digit but got: <EOF>\n\n1: 1.\n     ^\n"],
+            [ '1.e1', "Syntax Error GraphQL (1:3) Invalid number, expected digit but got: \"e\"\n\n1: 1.e1\n     ^\n"],
             [ '.123', "Syntax Error GraphQL (1:1) Cannot parse the unexpected character \".\".\n\n1: .123\n   ^\n"],
             [ '1.A', "Syntax Error GraphQL (1:3) Invalid number, expected digit but got: \"A\"\n\n1: 1.A\n     ^\n"],
             [ '-A', "Syntax Error GraphQL (1:2) Invalid number, expected digit but got: \"A\"\n\n1: -A\n    ^\n"],