diff --git a/PCbuild/rt.bat b/PCbuild/rt.bat
new file mode 100755
index 00000000000..142349bed76
--- /dev/null
+++ b/PCbuild/rt.bat
@@ -0,0 +1,8 @@
+@rem Run Tests.  Run the regression test suite.
+@rem Plain "rt" runs Release build, arguments passed on to regrtest.
+@rem "rt -d" runs Debug build similarly, after shifting off -d.
+@set _exe=python
+@if "%1" =="-d" set _exe=python_d
+@if "%1" =="-d" shift
+%_exe% ../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
+@set _exe=