diff --git a/src/main/scala/com/github/tkawachi/doctest/ScaladocExtractor.scala b/src/main/scala/com/github/tkawachi/doctest/ScaladocExtractor.scala
index 5d63606b..80e2c287 100644
--- a/src/main/scala/com/github/tkawachi/doctest/ScaladocExtractor.scala
+++ b/src/main/scala/com/github/tkawachi/doctest/ScaladocExtractor.scala
@@ -1,6 +1,5 @@
 package com.github.tkawachi.doctest
 
-import java.io.File
 import java.nio.file.Files
 import java.nio.file.Path
 import scala.meta._