diff --git a/devel/shflags/Makefile b/devel/shflags/Makefile
index 76ca0022a0c4..364d1753f43d 100644
--- a/devel/shflags/Makefile
+++ b/devel/shflags/Makefile
@@ -10,6 +10,12 @@ WWW=		https://github.com/kward/shflags
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+TEST_DEPENDS=	bash:shells/bash \
+		dash:shells/dash \
+		ksh93:shells/ksh \
+		mksh:shells/mksh \
+		zsh:shells/zsh
+
 NO_ARCH=	yes
 NO_BUILD=	yes
 
@@ -18,7 +24,13 @@ PLIST_FILES=	lib/shflags
 GH_ACCOUNT=	kward
 USE_GITHUB=	yes
 
+post-patch:
+	@${REINPLACE_CMD} -e 's|%%LOCALBASE%%|${LOCALBASE}|g' ${WRKSRC}/test_runner
+
 do-install:
 	${INSTALL_DATA} ${WRKSRC}/shflags ${STAGEDIR}${PREFIX}/lib/
 
+do-test:
+	cd ${WRKSRC} && ${SH} test_runner
+
 .include <bsd.port.mk>
diff --git a/devel/shflags/files/patch-test_runner b/devel/shflags/files/patch-test_runner
new file mode 100644
index 000000000000..85e75e7b80af
--- /dev/null
+++ b/devel/shflags/files/patch-test_runner
@@ -0,0 +1,11 @@
+--- test_runner.orig	2023-08-22 09:34:14 UTC
++++ test_runner
+@@ -39,7 +39,7 @@
+ RUNNER_LOADED=0
+ 
+ RUNNER_ARGV0=`basename "$0"`
+-RUNNER_SHELLS='/bin/sh ash /bin/bash /bin/dash /bin/ksh /bin/mksh /bin/zsh'
++RUNNER_SHELLS='/bin/sh %%LOCALBASE%%/bin/bash %%LOCALBASE%%/bin/dash %%LOCALBASE%%/bin/ksh93 %%LOCALBASE%%/bin/mksh %%LOCALBASE%%/bin/zsh'
+ RUNNER_TEST_SUFFIX='_test.sh'
+ true; RUNNER_TRUE=$?
+ false; RUNNER_FALSE=$?