diff --git a/t-tap/test_commands.c b/t-tap/test_commands.c
index fe004053..01464f7b 100644
--- a/t-tap/test_commands.c
+++ b/t-tap/test_commands.c
@@ -447,6 +447,7 @@ void test_host_commands(void)
 	int pre = 0, prev_comment_id = next_comment_id;
 	unsigned int prev_downtime_id;
 	time_t check_time = 0;
+	time_t current_time = 0;
 	char *cmdstr = NULL;
 	scheduled_downtime *downtime = NULL;
 	target_host = find_host(host_name);
@@ -522,6 +523,17 @@ void test_host_commands(void)
 	ok(!target_host->problem_has_been_acknowledged, "ACKNOWLEDGE_HOST_PROBLEM_EXPIRE with past end_time doesn't acknowledge a host problem");
 	target_host->current_state = STATE_UP;
 
+	clear_event_queue();
+	target_host->current_state = STATE_DOWN;
+	time(&current_time);
+	nm_asprintf(&cmdstr, "[1234567890] ACKNOWLEDGE_HOST_PROBLEM_EXPIRE;host1;2;0;0;%llu;myself;expire in two seconds", (unsigned long long int)current_time+2);
+	ok(CMD_ERROR_OK == process_external_command1(cmdstr), "core command: ACKNOWLEDGE_HOST_PROBLEM_EXPIRE");
+	ok(target_host->problem_has_been_acknowledged, "ACKNOWLEDGE_HOST_PROBLEM_EXPIRE acknowledgement present before event");
+	sleep(3);
+	event_poll();
+	ok(!target_host->problem_has_been_acknowledged, "ACKNOWLEDGE_HOST_PROBLEM_EXPIRE acknowledgement gone after event");
+	free(cmdstr);
+
 	ok(CMD_ERROR_OK == process_external_command1("[1234567890] DISABLE_HOST_EVENT_HANDLER;host1"), "core command: DISABLE_HOST_EVENT_HANDLER");
 	ok(!target_host->event_handler_enabled, "DISABLE_HOST_EVENT_HANDLER disables event handler for a host");
 
@@ -683,7 +695,7 @@ void test_core_commands(void)
 int main(int /*@unused@*/ argc, char /*@unused@*/ **arv)
 {
 	const char *test_config_file = TESTDIR "naemon.cfg";
-	plan_tests(513);
+	plan_tests(516);
 	init_event_queue();
 
 	config_file_dir = nspath_absolute_dirname(test_config_file, NULL);