libc.kldload(self.module_name)
+                result = libc.kldload(self.module_name)
+                if result != 0 and result != 17:  # 17 is EEXIST (already loaded)
+                    raise RuntimeError(f"Failed to load kernel module '{self.module_name}' (error {result})")
                 family_id = self.nlsock.get_genl_family_id(NETLINK_FAMILY)
             else:
                 raise
@@ -103,7 +109,9 @@ class KtestLoader(object):
     def load_ktests(self):
         ret = self._load_ktests()
         if not ret and self.autoload:
-            libc.kldload(self.module_name)
+            result = libc.kldload(self.module_name)
+            if result != 0 and result != 17:  # 17 is EEXIST (already loaded)
+                raise RuntimeError(f"Failed to load kernel module '{self.module_name}' (error {result})")
             ret = self._load_ktests()
         return ret
 
diff --git a/tests/sys/netinet/Makefile b/tests/sys/netinet/Makefile
index b742342beecb..9739221676ce 100644
--- a/tests/sys/netinet/Makefile
+++ b/tests/sys/netinet/Makefile
@@ -30,6 +30,7 @@ ATF_TESTS_SH=	arp \
 
 ATF_TESTS_PYTEST+=	carp.py
 ATF_TESTS_PYTEST+=	igmp.py
+ATF_TESTS_PYTEST+=	tcp_hpts_test.py
 
 LIBADD.so_reuseport_lb_test=	pthread
 LIBADD.udp_bindings=		pthread
diff --git a/tests/sys/netinet/tcp_hpts_test.py b/tests/sys/netinet/tcp_hpts_test.py
new file mode 100644
index 000000000000..c56383fb310f
--- /dev/null
+++ b/tests/sys/netinet/tcp_hpts_test.py
@@ -0,0 +1,4 @@
+from atf_python.ktest import BaseKernelTest
+
+class TestTcpHpts(BaseKernelTest):
+    KTEST_MODULE_NAME = "ktest_tcphpts"