diff --git a/nimble/host/test/src/ble_hs_hci_test.c b/nimble/host/test/src/ble_hs_hci_test.c
index cbfda3599..fee025318 100644
--- a/nimble/host/test/src/ble_hs_hci_test.c
+++ b/nimble/host/test/src/ble_hs_hci_test.c
@@ -103,8 +103,8 @@ TEST_CASE_SELF(ble_hs_hci_acl_one_conn)
 
     ble_hs_test_util_init();
 
-    /* The controller has room for five 20-byte payloads (+ 4-byte header). */
-    rc = ble_hs_hci_set_buf_sz(24, 5);
+    /* The controller has room for five 20-byte payloads. */
+    rc = ble_hs_hci_set_buf_sz(20, 5);
     TEST_ASSERT_FATAL(rc == 0);
     TEST_ASSERT_FATAL(ble_hs_hci_avail_pkts == 5);
 
@@ -191,8 +191,8 @@ TEST_CASE_SELF(ble_hs_hci_acl_two_conn)
 
     ble_hs_test_util_init();
 
-    /* The controller has room for five 20-byte payloads (+ 4-byte header). */
-    rc = ble_hs_hci_set_buf_sz(24, 5);
+    /* The controller has room for five 20-byte payloads*/
+    rc = ble_hs_hci_set_buf_sz(20, 5);
     TEST_ASSERT_FATAL(rc == 0);
     TEST_ASSERT_FATAL(ble_hs_hci_avail_pkts == 5);