1 files changed, 21 insertions, 1 deletions
diff --git a/test/runner.rb b/test/runner.rb
index c8a06e1dd9..aa7a5f8ba3 100644
--- a/test/runner.rb
+++ b/test/runner.rb
@@ -2,4 +2,24 @@ require 'rbconfig'
 exit if CROSS_COMPILING
 
 require 'test/unit'
-Test::Unit.setup_argv
+
+src_testdir = File.dirname(File.expand_path(__FILE__))
+srcdir = File.dirname(src_testdir)
+
+Test::Unit.setup_argv {|files|
+  if files.empty?
+    [src_testdir]
+  else
+    files.map {|f|
+      if File.exist? f
+        f
+      elsif File.exist? "#{src_testdir}/#{f}"
+        "#{src_testdir}/#{f}"
+      elsif File.exist? "#{srcdir}/#{f}"
+        "#{srcdir}/#{f}"
+      else
+        raise ArgumentError, "not found: #{f}"
+      end
+    }
+  end
+}