diff --git a/sanei/sanei_usb.c b/sanei/sanei_usb.c
index c901d0760..a131c9cc8 100644
--- a/sanei/sanei_usb.c
+++ b/sanei/sanei_usb.c
@@ -195,15 +195,16 @@ static sanei_usb_testing_mode testing_mode = sanei_usb_testing_mode_disabled;
 
 #if WITH_USB_RECORD_REPLAY
 static int testing_development_mode = 0;
-int testing_known_commands_input_failed = 0;
-unsigned testing_last_known_seq = 0;
-SANE_String testing_record_backend = NULL;
-xmlNode* testing_append_commands_node = NULL;
+static int testing_already_opened = 0;
+static int testing_known_commands_input_failed = 0;
+static unsigned testing_last_known_seq = 0;
+static SANE_String testing_record_backend = NULL;
+static xmlNode* testing_append_commands_node = NULL;
 
 // XML file from which we read testing data
-SANE_String testing_xml_path = NULL;
-xmlDoc* testing_xml_doc = NULL;
-xmlNode* testing_xml_next_tx_node = NULL;
+static SANE_String testing_xml_path = NULL;
+static xmlDoc* testing_xml_doc = NULL;
+static xmlNode* testing_xml_next_tx_node = NULL;
 #endif // WITH_USB_RECORD_REPLAY
 
 #if defined(HAVE_LIBUSB_LEGACY) || defined(HAVE_LIBUSB)
@@ -1200,7 +1201,7 @@ static SANE_Status sanei_usb_testing_init()
           memset(&device, 0, sizeof(device));
           device.devname = strdup(testing_xml_path);
 
-          // other code shouldn't depend on methon because testing_mode is
+          // other code shouldn't depend on method because testing_mode is
           // sanei_usb_testing_mode_replay
           device.method = sanei_usb_method_libusb;
           device.vendor = device_id;
@@ -1303,6 +1304,18 @@ static void sanei_usb_testing_exit()
   xmlFreeDoc(testing_xml_doc);
   free(testing_xml_path);
   xmlCleanupParser();
+
+  // reset testing-related all data to initial values
+  testing_development_mode = 0;
+  testing_already_opened = 0;
+  testing_known_commands_input_failed = 0;
+  testing_last_known_seq = 0;
+  testing_record_backend = NULL;
+  testing_append_commands_node = NULL;
+
+  testing_xml_path = NULL;
+  testing_xml_doc = NULL;
+  testing_xml_next_tx_node = NULL;
 }
 #else // WITH_USB_RECORD_REPLAY
 SANE_Status sanei_usb_testing_enable_replay(SANE_String_Const path,
@@ -2303,6 +2316,9 @@ static void sanei_xml_indent_child(xmlNode* parent, unsigned indent_count)
 
 static void sanei_usb_record_open(SANE_Int dn)
 {
+  if (testing_already_opened)
+    return;
+
   xmlNode* e_root = xmlNewNode(NULL, (const xmlChar*) "device_capture");
   xmlDocSetRootElement(testing_xml_doc, e_root);
   xmlNewProp(e_root, (const xmlChar*)"backend", (const xmlChar*) testing_record_backend);
@@ -2366,7 +2382,8 @@ static void sanei_usb_record_open(SANE_Int dn)
   xmlNode* e_transactions = xmlNewChild(e_root, NULL, (const xmlChar*)"transactions", NULL);
 
   // add an empty node so that we have something to append to
-  testing_append_commands_node =  xmlAddChild(e_transactions, xmlNewText((const xmlChar*)""));;
+  testing_append_commands_node = xmlAddChild(e_transactions, xmlNewText((const xmlChar*)""));
+  testing_already_opened = 1;
 }
 #endif // WITH_USB_RECORD_REPLAY