diff --git a/NEWS b/NEWS
index 59d1aea9a..b78d45831 100644
--- a/NEWS
+++ b/NEWS
@@ -17,6 +17,9 @@ Any uppercase BUG_* names are modernish shell bug IDs.
   status on the 'print', 'printf' and 'echo' builtins and prevent possible
   infinite loops if SIGPIPE is ignored.
 
+- Add a convenient bin/run_ksh_tests script to the source tree that
+  sets up the necessary environment and runs the ksh regression tests.
+
 2020-05-13:
 
 - Fix BUG_CASELIT: an undocumented 'case' pattern matching misbehaviour that
diff --git a/bin/shtests b/bin/shtests
new file mode 100755
index 000000000..713102998
--- /dev/null
+++ b/bin/shtests
@@ -0,0 +1,40 @@
+#! /bin/sh
+# Wrapper script to run the ksh93 regression tests without requiring nmake.
+# By Martijn Dekker <martijn@inlv.org> 2020-05-14
+# Public domain. http://creativecommons.org/publicdomain/zero/1.0/
+#
+# The manual: bin/shtests --man
+# Brief help: bin/shtests --help
+#
+# By default, this runs your compiled arch/*/bin/ksh.
+# To use another ksh, run:  KSH=path/to/ksh bin/shtests
+
+# Find root dir of ksh source
+mydir=$(dirname "$0") \
+&& mydir=$(CDPATH='' cd -P -- "$mydir/.." && printf '%sX' "$PWD") \
+&& mydir=${mydir%X} \
+|| exit
+
+# Check if there is a ksh to test.
+case ${KSH+set} in
+( '' )	myarch=$("$mydir/bin/package" host) || exit
+	KSH=$mydir/arch/$myarch/bin/ksh ;;
+esac
+if ! test -x "$KSH" || ! test -f "$KSH"; then
+	printf '%s: shell not found: %s\n' "${0##*/}" "$KSH" >&2
+	printf 'Specify a shell like:  KSH=path/to/ksh bin/shtests\n' >&2
+	exit 1
+fi
+
+# Ensure absolute path to ksh
+KSH=$(CDPATH='' cd -P -- "$(dirname "$KSH")" \
+	&& printf '%s/%sX' "$PWD" "${KSH##*/}") \
+&& KSH=${KSH%X}
+
+# Run the test suite
+CDPATH='' cd -P -- "$mydir/src/cmd/ksh93/tests" || exit
+SHELL=$KSH
+export SHELL
+unset -v KSH
+printf '#### Regression-testing %s ####\n' "$SHELL"
+exec "$SHELL" shtests "$@"