diff --git a/test/ruby/envutil.rb b/test/ruby/envutil.rb
index 9759da0f73..e9b4b30896 100644
--- a/test/ruby/envutil.rb
+++ b/test/ruby/envutil.rb
@@ -133,7 +133,7 @@ module Test
   module Unit
     module Assertions
       public
-      def assert_valid_syntax(code, fname, mesg = fname)
+      def assert_valid_syntax(code, fname = caller_locations(1, 1)[0], mesg = fname.to_s)
         code = code.dup.force_encoding("ascii-8bit")
         code.sub!(/\A(?:\xef\xbb\xbf)?(\s*\#.*$)*(\n)?/n) {
           "#$&#{"\n" if $1 && !$2}BEGIN{throw tag, :ok}\n"
@@ -141,15 +141,23 @@ module Test
         code.force_encoding("us-ascii")
         verbose, $VERBOSE = $VERBOSE, nil
         yield if defined?(yield)
+        case
+        when Array === fname
+          fname, line = *fname
+        when defined?(fname.path) && defined?(fname.lineno)
+          fname, line = fname.path, fname.lineno
+        else
+          line = 0
+        end
         assert_nothing_raised(SyntaxError, mesg) do
-          assert_equal(:ok, catch {|tag| eval(code, binding, fname, 0)}, mesg)
+          assert_equal(:ok, catch {|tag| eval(code, binding, fname, line)}, mesg)
         end
       ensure
         $VERBOSE = verbose
       end
 
       def assert_normal_exit(testsrc, message = '', opt = {})
-        assert_valid_syntax(testsrc, caller_locations(1, 1)[0].path)
+        assert_valid_syntax(testsrc, caller_locations(1, 1)[0])
         if opt.include?(:child_env)
           opt = opt.dup
           child_env = [opt.delete(:child_env)] || []
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 5af1ea48ba..8c1d0715df 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -278,7 +278,7 @@ eom
   def not_label(x) @result = x; @not_label ||= nil end
   def assert_not_label(expected, src, message = nil)
     @result = nil
-    assert_nothing_raised(SyntaxError, message) {eval(src)}
+    assert_valid_syntax(src, message)
     assert_equal(expected, @result, message)
   end