diff --git a/.travis.yml b/.travis.yml
index f9ea126cc5..741c0a32ef 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -106,9 +106,7 @@ matrix:
   include:
     - <<: *arm64-linux
     - <<: *ppc64le-linux
-    # FIXME: The job fails with exceeding the maximum time limit 50 minutes.
-    # https://bugs.ruby-lang.org/issues/20013#note-13
-    # - <<: *s390x-linux
+    - <<: *s390x-linux
     # FIXME: lib/rubygems/util.rb:104 glob_files_in_dir -
     # <internal:dir>:411:in glob: File name too long - (Errno::ENAMETOOLONG)
     # https://github.com/rubygems/rubygems/issues/7132