diff --git a/lib/rim/command_helper.rb b/lib/rim/command_helper.rb
index d978ac3..2c8302f 100644
--- a/lib/rim/command_helper.rb
+++ b/lib/rim/command_helper.rb
@@ -35,7 +35,7 @@ def check_arguments
   def create_module_info(remote_url, local_path, target_revision, ignores, subdir)
     ModuleInfo.new(
         remote_url,
-        get_relative_path(local_path),
+        FileHelper.get_relative_path(local_path),
         target_revision,
         ignores,
         remote_url ? get_remote_branch_format(remote_url) : nil,
diff --git a/test/dirty_check_test.rb b/test/dirty_check_test.rb
index 5d4f366..bab988a 100644
--- a/test/dirty_check_test.rb
+++ b/test/dirty_check_test.rb
@@ -7,7 +7,7 @@
 require 'rim/rim_info'
 require 'rim/dirty_check'
 
-class DirtyCheckTest < MiniTest::Test
+class DirtyCheckTest < Minitest::Test
 
 include FileUtils
 include TestHelper
diff --git a/test/git_test.rb b/test/git_test.rb
index cb3136a..0483c9d 100644
--- a/test/git_test.rb
+++ b/test/git_test.rb
@@ -6,7 +6,7 @@
 require 'test_helper'
 require 'rim/git'
 
-class GitTest < MiniTest::Test
+class GitTest < Minitest::Test
 
 include FileUtils
 include TestHelper
diff --git a/test/rim_info_test.rb b/test/rim_info_test.rb
index f378f50..26f84b9 100644
--- a/test/rim_info_test.rb
+++ b/test/rim_info_test.rb
@@ -6,7 +6,7 @@
 require 'test_helper'
 require 'rim/rim_info'
 
-class RimInfoTest < MiniTest::Test
+class RimInfoTest < Minitest::Test
 
 include FileUtils
 include TestHelper
diff --git a/test/status_builder_test.rb b/test/status_builder_test.rb
index 3250ea6..7bd4fd2 100644
--- a/test/status_builder_test.rb
+++ b/test/status_builder_test.rb
@@ -8,7 +8,7 @@
 require 'rim/dirty_check'
 require 'rim/status_builder'
 
-class StatusBuilderTest < MiniTest::Test
+class StatusBuilderTest < Minitest::Test
 
 include FileUtils
 include TestHelper