diff --git a/contrib/gana b/contrib/gana
index 4dd732710..832685b6a 160000
--- a/contrib/gana
+++ b/contrib/gana
@@ -1 +1 @@
-Subproject commit 4dd732710277a1761972e08707578b01ecf2d678
+Subproject commit 832685b6a942a6ebbec8e1e5b8c33b6b85b0a727
diff --git a/src/include/taler_testing_lib.h b/src/include/taler_testing_lib.h
index 55d36b2de..0418ab17e 100644
--- a/src/include/taler_testing_lib.h
+++ b/src/include/taler_testing_lib.h
@@ -868,6 +868,24 @@ struct GNUNET_OS_Process *
 TALER_TESTING_run_bank (const char *config_filename,
                         const char *bank_url);
 
+
+/**
+ * Prepare libeufin sandbox execution.  Check if the port is available and
+ * reset database.
+ *
+ * @param config_filename configuration file name.
+ * @param reset_db should we reset the bank's database
+ * @param config_section which configuration section should be used
+ * @param[out] bc set to the bank's configuration data
+ * @return #GNUNET_OK on success
+ */
+enum GNUNET_GenericReturnValue
+TALER_TESTING_prepare_libeufin (const char *config_filename,
+                                bool reset_db,
+                                const char *config_section,
+                                struct TALER_TESTING_BankConfiguration *bc);
+
+
 /**
  * Start the (nexus) bank process.  Assume the port
  * is available and the database is clean.  Use the "prepare
@@ -909,7 +927,7 @@ TALER_TESTING_run_fakebank (const char *bank_url,
  */
 enum GNUNET_GenericReturnValue
 TALER_TESTING_prepare_bank (const char *config_filename,
-                            int reset_db,
+                            bool reset_db,
                             const char *config_section,
                             struct TALER_TESTING_BankConfiguration *bc);
 
diff --git a/src/testing/testing_api_helpers_bank.c b/src/testing/testing_api_helpers_bank.c
index b67c92ab3..2507a87e9 100644
--- a/src/testing/testing_api_helpers_bank.c
+++ b/src/testing/testing_api_helpers_bank.c
@@ -1,6 +1,6 @@
 /*
   This file is part of TALER
-  Copyright (C) 2018-2021 Taler Systems SA
+  Copyright (C) 2018-2023 Taler Systems SA
 
   TALER is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as
@@ -299,7 +299,7 @@ TALER_TESTING_run_bank (const char *config_filename,
 
 enum GNUNET_GenericReturnValue
 TALER_TESTING_prepare_libeufin (const char *config_filename,
-                                int reset_db,
+                                bool reset_db,
                                 const char *config_section,
                                 struct TALER_TESTING_BankConfiguration *bc)
 {
@@ -354,9 +354,9 @@ TALER_TESTING_prepare_libeufin (const char *config_filename,
       GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
                                      (uint16_t) port))
   {
-    fprintf (stderr,
-             "Required port %llu not available, skipping.\n",
-             port);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Required port %llu not available, skipping.\n",
+                port);
     GNUNET_break (0);
     GNUNET_free (database);
     GNUNET_CONFIGURATION_destroy (cfg);
@@ -364,7 +364,7 @@ TALER_TESTING_prepare_libeufin (const char *config_filename,
   }
 
   /* DB preparation */
-  if (GNUNET_YES == reset_db)
+  if (reset_db)
   {
     if (0 != system ("rm -f /tmp/libeufin-exchange-test-nexusdb.sqlite3"))
     {
@@ -414,11 +414,14 @@ TALER_TESTING_prepare_libeufin (const char *config_filename,
               "Relying on nexus %s on port %u\n",
               bc->exchange_auth.wire_gateway_url,
               (unsigned int) port);
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "exchange payto: %s\n",
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "exchange payto: %s\n",
               bc->exchange_payto);
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "user42_payto: %s\n",
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "user42_payto: %s\n",
               bc->user42_payto);
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "user42_payto: %s\n",
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "user42_payto: %s\n",
               bc->user43_payto);
   return GNUNET_OK;
 }
@@ -426,7 +429,7 @@ TALER_TESTING_prepare_libeufin (const char *config_filename,
 
 enum GNUNET_GenericReturnValue
 TALER_TESTING_prepare_bank (const char *config_filename,
-                            int reset_db,
+                            bool reset_db,
                             const char *config_section,
                             struct TALER_TESTING_BankConfiguration *bc)
 {
@@ -498,9 +501,9 @@ TALER_TESTING_prepare_bank (const char *config_filename,
       GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
                                      (uint16_t) port))
   {
-    fprintf (stderr,
-             "Required port %llu not available, skipping.\n",
-             port);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Required port %llu not available, skipping.\n",
+                port);
     GNUNET_break (0);
     GNUNET_free (database);
     GNUNET_CONFIGURATION_destroy (cfg);
@@ -508,7 +511,7 @@ TALER_TESTING_prepare_bank (const char *config_filename,
   }
 
   /* DB preparation */
-  if (GNUNET_YES == reset_db)
+  if (reset_db)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                 "Flushing bank database\n");