diff --git a/tests/ExporterTest.php b/tests/ExporterTest.php
index 6f805df..b0546f1 100644
--- a/tests/ExporterTest.php
+++ b/tests/ExporterTest.php
@@ -313,7 +313,7 @@ EOF;
         try {
             $this->assertSame(
               "'いろはにほへとちりぬるをわかよたれそつねならむうゐのおくや...しゑひもせす'",
-              $this->trimnl($this->exporter->shortenedExport('いろはにほへとちりぬるをわかよたれそつねならむうゐのおくやまけふこえてあさきゆめみしゑひもせす'))
+              $this->trimNewline($this->exporter->shortenedExport('いろはにほへとちりぬるをわかよたれそつねならむうゐのおくやまけふこえてあさきゆめみしゑひもせす'))
             );
         } catch (\Exception $e) {
             mb_internal_encoding($oldMbInternalEncoding);