diff --git a/tests/sys/kern/ptrace_test.c b/tests/sys/kern/ptrace_test.c
--- a/tests/sys/kern/ptrace_test.c
+++ b/tests/sys/kern/ptrace_test.c
@@ -4368,6 +4368,48 @@
 	ATF_REQUIRE(ptrace(PT_DETACH, fpid, (caddr_t)1, 0) != -1);
 }
 
+/*
+ * Make sure that procctl(PROC_REAP_KILL) can kill a process that's stopped
+ * waiting for a debugger.
+ */
+ATF_TC_WITHOUT_HEAD(ptrace__reap_kill_stopped);
+ATF_TC_BODY(ptrace__reap_kill_stopped, tc)
+{
+	struct procctl_reaper_kill prk;
+	pid_t debuggee, killer, wpid;
+	int status;
+
+	REQUIRE_EQ(procctl(P_PID, getpid(), PROC_REAP_ACQUIRE, NULL), 0);
+
+	debuggee = fork();
+	ATF_REQUIRE(debuggee >= 0);
+	if (debuggee == 0) {
+		trace_me();
+		exit(0);
+	}
+	attach_child(debuggee);
+
+	killer = fork();
+	ATF_REQUIRE(killer >= 0);
+	if (killer == 0) {
+		int error;
+
+		memset(&prk, 0, sizeof(prk));
+		prk.rk_sig = SIGINT;
+		errno = 0;
+		error = procctl(P_PID, getppid(), PROC_REAP_KILL, &prk);
+		CHILD_REQUIRE_EQ(error, 0);
+		CHILD_REQUIRE_EQ(1, prk.rk_killed);
+		CHILD_REQUIRE_EQ(-1, prk.rk_fpid);
+		_exit(errno);
+	}
+
+	wpid = waitpid(killer, &status, 0);
+	REQUIRE_EQ(wpid, killer);
+	ATF_REQUIRE_MSG(WEXITSTATUS(status) == 0,
+	    "killer failed with error %d", WEXITSTATUS(status));
+}
+
 ATF_TP_ADD_TCS(tp)
 {
 	ATF_TP_ADD_TC(tp, ptrace__parent_wait_after_trace_me);
@@ -4434,6 +4476,7 @@
 	ATF_TP_ADD_TC(tp, ptrace__procdesc_wait_child);
 	ATF_TP_ADD_TC(tp, ptrace__procdesc_reparent_wait_child);
 	ATF_TP_ADD_TC(tp, ptrace__PT_SC_REMOTE_getpid);
+	ATF_TP_ADD_TC(tp, ptrace__reap_kill_stopped);
 
 	return (atf_no_error());
 }