diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 49a9a3b..4b192de 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,14 +11,14 @@ jobs:
     name: build (${{ matrix.ruby }} / ${{ matrix.os }})
     strategy:
       matrix:
-        ruby: [ head, '3.0', '2.7' ]
+        ruby: ['2.7', '3.0', '3.1', '3.2', 'head']
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         exclude:
         - { os: windows-latest, ruby: head }
         include:
         - { os: windows-latest, ruby: mingw }
         - { os: windows-latest, ruby: mswin }
-        - { os: ubuntu-latest, ruby: 'jruby-9.3', bundle: 'bundle exec' }
+        - { os: ubuntu-latest, ruby: 'jruby-head', bundle: 'bundle exec' }
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3
diff --git a/test/test_pp.rb b/test/test_pp.rb
index 4fcb8df..bb2299a 100644
--- a/test/test_pp.rb
+++ b/test/test_pp.rb
@@ -5,15 +5,6 @@
 require 'test/unit'
 require 'ruby2_keywords'
 
-# Define bind_call for Ruby 2.6 and earlier, to allow testing on JRuby 9.3
-class UnboundMethod
-  unless public_method_defined?(:bind_call)
-    def bind_call(obj, *args, &block)
-      bind(obj).call(*args, &block)
-    end
-  end
-end
-
 module PPTestModule
 
 class PPTest < Test::Unit::TestCase
@@ -173,11 +164,12 @@ def test_anonymous
   end
 
   def test_withinspect
+    omit if RUBY_ENGINE == "jruby"
     a = []
     a << HasInspect.new(a)
     assert_equal("[<inspect:[...]>]\n", PP.pp(a, ''.dup))
     assert_equal("#{a.inspect}\n", PP.pp(a, ''.dup))
-  end unless RUBY_VERSION < "2.7" # temporary mask to test on JRuby 9.3 (2.6 equivalent)
+  end
 
   def test_share_nil
     begin
@@ -197,6 +189,7 @@ def test_hash
   end
 
   def test_hash_in_array
+    omit if RUBY_ENGINE == "jruby"
     assert_equal("[{}]", PP.singleline_pp([->(*a){a.last.clear}.ruby2_keywords.call(a: 1)], ''.dup))
     assert_equal("[{}]", PP.singleline_pp([Hash.ruby2_keywords_hash({})], ''.dup))
   end