diff --git a/test/central_directory_test.rb b/test/central_directory_test.rb
index 97b5c48..88258ca 100644
--- a/test/central_directory_test.rb
+++ b/test/central_directory_test.rb
@@ -48,7 +48,8 @@ class ZipCentralDirectoryTest < MiniTest::Test
     [
       ['test/data/osx-archive.zip', 4],
       ['test/data/zip64-sample.zip', 2],
-      ['test/data/max_length_file_comment.zip', 1]
+      ['test/data/max_length_file_comment.zip', 1],
+      ['test/data/100000-files.zip', 100_000]
     ].each do |filename, num_entries|
       cdir = ::Zip::CentralDirectory.new
 
diff --git a/test/data/100000-files.zip b/test/data/100000-files.zip
new file mode 100644
index 0000000..ee3751b
Binary files /dev/null and b/test/data/100000-files.zip differ
diff --git a/test/file_test.rb b/test/file_test.rb
index 13e9870..cf3619f 100644
--- a/test/file_test.rb
+++ b/test/file_test.rb
@@ -190,7 +190,8 @@ class ZipFileTest < MiniTest::Test
     [
       ['test/data/osx-archive.zip', 4],
       ['test/data/zip64-sample.zip', 2],
-      ['test/data/max_length_file_comment.zip', 1]
+      ['test/data/max_length_file_comment.zip', 1],
+      ['test/data/100000-files.zip', 100_000]
     ].each do |filename, num_entries|
       assert_equal(num_entries, ::Zip::File.count_entries(filename))