diff --git a/lib/telebugs/middleware/gem_root_filter.rb b/lib/telebugs/middleware/gem_root_filter.rb
index a9e6b58..c5f3fe9 100644
--- a/lib/telebugs/middleware/gem_root_filter.rb
+++ b/lib/telebugs/middleware/gem_root_filter.rb
@@ -42,8 +42,13 @@ def format_file(file)
         parts = file.split("/")
 
         gem_info = parts[0].split("-")
-        gem_name = gem_info[0]
-        gem_version = gem_info[1]
+        if gem_info.size < 2
+          gem_name = gem_info[0]
+          gem_version = gem_info[1]
+        else
+          gem_name = gem_info[0..-2].join("-")
+          gem_version = gem_info[-1]
+        end
 
         file_path = parts[1..].join("/")
 
diff --git a/test/middleware/test_gem_root_filter.rb b/test/middleware/test_gem_root_filter.rb
index 6e11ab9..4a32c88 100644
--- a/test/middleware/test_gem_root_filter.rb
+++ b/test/middleware/test_gem_root_filter.rb
@@ -4,21 +4,26 @@
 
 class TestGemRootFilter < Minitest::Test
   def test_gem_root_filter
-    begin
-      raise StandardError.new("test error")
-    rescue => e
-      report = Telebugs::Report.new(e)
-    end
+    gem_path = Gem.path.first
 
+    e = StandardError.new("test error")
+    e.set_backtrace([
+      "#{gem_path}/gems/minitest-5.14.0/lib/minitest/test.rb:3:in `block in <top (required)>'",
+      "/test/middleware/test_gem_root_filter.rb:3:in `test_gem_root_filter'",
+      "#{gem_path}/gems/turbo-rails-2.0.5/lib/turbo-rails.rb:3:in `block in <top (required)>'",
+      "#{gem_path}/gems/turbo-turbo-rails-rails-2.0.5/lib/turbo-rails.rb:3:in `block in <top (required)>'",
+      "#{gem_path}/gems/turbo_turbo_rails-2.0.5/lib/turbo-rails.rb:3:in `block in <top (required)>'"
+    ])
+
+    report = Telebugs::Report.new(e)
     Telebugs::Middleware::GemRootFilter.new.call(report)
 
-    assert_match(
-      %r{/test/middleware/test_gem_root_filter.rb},
-      report.data[:errors][0][:backtrace][0][:file]
-    )
-    assert_match(
-      %r{\Aminitest \(.+\..+\..+\) lib/minitest/test.rb\z},
-      report.data[:errors][0][:backtrace][1][:file]
-    )
+    assert_equal [
+      "minitest (5.14.0) lib/minitest/test.rb",
+      "/test/middleware/test_gem_root_filter.rb",
+      "turbo-rails (2.0.5) lib/turbo-rails.rb",
+      "turbo-turbo-rails-rails (2.0.5) lib/turbo-rails.rb",
+      "turbo_turbo_rails (2.0.5) lib/turbo-rails.rb"
+    ], report.data[:errors].first[:backtrace].map { |f| f[:file] }
   end
 end