diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 16764a2146..4488ea620e 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -1394,6 +1394,7 @@ x = __ENCODING__
                 1
     end;
     assert_equal(expected, eval(code))
+    assert_equal(expected, obj.arg)
 
     assert_valid_syntax(code = "#{<<~"do;"}\n#{<<~'end;'}")
     do;
@@ -1401,6 +1402,7 @@ x = __ENCODING__
                   1
     end;
     assert_equal(expected, eval(code))
+    assert_equal(expected, obj.arg)
   end
 
 =begin
diff --git a/test/ruby/test_pattern_matching.rb b/test/ruby/test_pattern_matching.rb
index b8c445c806..36731e14f9 100644
--- a/test/ruby/test_pattern_matching.rb
+++ b/test/ruby/test_pattern_matching.rb
@@ -1155,19 +1155,26 @@ END
       end
     end
 
-    [{a: 42}, {b: 42}].each do |i|
-      assert_block('newline should be insignificant after pattern label') do
+    bug18890 = assert_warning(/(?:.*:[47]: warning: unused literal ignored\n){2}/) do
+      eval("#{<<~';;;'}")
+      proc do |i|
         case i
         in a:
-          0
-          true
+          0 # line 4
+          a
         in "b":
-          0
-          true
+          0 # line 7
+          b
         else
           false
         end
       end
+      ;;;
+    end
+    [{a: 42}, {b: 42}].each do |i|
+      assert_block('newline should be significant after pattern label') do
+        bug18890.call(i)
+      end
     end
 
     assert_syntax_error(%q{