diff --git a/tests/libqos/ahci.c b/tests/libqos/ahci.c
index 99e85d5..79398b4 100644
--- a/tests/libqos/ahci.c
+++ b/tests/libqos/ahci.c
@@ -882,6 +882,30 @@
     return cmd;
 }
 
+void ahci_atapi_eject(AHCIQState *ahci, uint8_t port)
+{
+    AHCICommand *cmd = ahci_atapi_command_create(CMD_ATAPI_START_STOP_UNIT, 0);
+    ahci_command_set_size(cmd, 0);
+
+    cmd->atapi_cmd[4] = 0x02; /* loej = true */
+    ahci_command_commit(ahci, cmd, port);
+    ahci_command_issue(ahci, cmd);
+    ahci_command_verify(ahci, cmd);
+    ahci_command_free(cmd);
+}
+
+void ahci_atapi_load(AHCIQState *ahci, uint8_t port)
+{
+    AHCICommand *cmd = ahci_atapi_command_create(CMD_ATAPI_START_STOP_UNIT, 0);
+    ahci_command_set_size(cmd, 0);
+
+    cmd->atapi_cmd[4] = 0x03; /* loej,start = true */
+    ahci_command_commit(ahci, cmd, port);
+    ahci_command_issue(ahci, cmd);
+    ahci_command_verify(ahci, cmd);
+    ahci_command_free(cmd);
+}
+
 void ahci_command_free(AHCICommand *cmd)
 {
     g_free(cmd->atapi_cmd);
@@ -910,6 +934,9 @@
         g_assert_cmpuint(lba, <=, UINT32_MAX);
         stl_be_p(&cbd[2], lba);
         break;
+    case CMD_ATAPI_START_STOP_UNIT:
+        g_assert_cmpuint(lba, ==, 0x00);
+        break;
     default:
         /* SCSI doesn't have uniform packet formats,
          * so you have to add support for it manually. Sorry! */
@@ -977,6 +1004,9 @@
         cbd[7] = (tmp & 0xFF00) >> 8;
         cbd[8] = (tmp & 0xFF);
         break;
+    case CMD_ATAPI_START_STOP_UNIT:
+        g_assert_cmpuint(xbytes, ==, 0);
+        break;
     default:
         /* SCSI doesn't have uniform packet formats,
          * so you have to add support for it manually. Sorry! */