diff --git a/src/testing/taler-unified-setup.sh b/src/testing/taler-unified-setup.sh
index a52aebff1..8f97b4405 100755
--- a/src/testing/taler-unified-setup.sh
+++ b/src/testing/taler-unified-setup.sh
@@ -201,9 +201,18 @@ register_sandbox_account() {
       demobank \
       delete \
       --bank-account "$1" &> /dev/null || true
-    libeufin-cli sandbox \
-      demobank \
-      register --name "$3"
+
+    MAYBE_IBAN="${4:-}"
+    if test -n "$MAYBE_IBAN"; then
+      libeufin-cli sandbox \
+        demobank \
+        register --name "$3" --iban "$MAYBE_IBAN"
+    else
+      libeufin-cli sandbox \
+        demobank \
+        register --name "$3"
+    fi
+
     unset LIBEUFIN_SANDBOX_USERNAME
     unset LIBEUFIN_SANDBOX_PASSWORD
 }
@@ -256,7 +265,11 @@ then
     fi
     echo "OK"
     echo -n "Register Sandbox users ..."
-    register_sandbox_account fortytwo x "Forty Two"
+    # The specified IBAN and name must match the ones hard-coded into
+    # the C helper for the add-incoming call.  Without this value,
+    # Sandbox  won't find the target account to debit along a /add-incoming
+    # call.
+    register_sandbox_account fortytwo x "User42" FR7630006000011234567890189
     register_sandbox_account fortythree x "Forty Three"
     register_sandbox_account exchange x "Exchange Company"
     register_sandbox_account tor x "Tor Project"
diff --git a/src/testing/test_bank_api.c b/src/testing/test_bank_api.c
index a2afdf06e..e197b152c 100644
--- a/src/testing/test_bank_api.c
+++ b/src/testing/test_bank_api.c
@@ -142,8 +142,8 @@ run (void *cls,
         "fetch-transactions-at-nexus",
         "exchange", /* from taler-nexus-prepare */
         "x", /* from taler-nexus-prepare */
-        "http://localhost:5001",
-        "my-bank-account") /* from taler-nexus-prepare */
+        "http://localhost:8082",
+        "exchange-nexus") /* from taler-nexus-prepare */
       : TALER_TESTING_cmd_sleep ("nop",
                                  0),
       TALER_TESTING_cmd_bank_debits ("history-2b",