diff --git a/src/testing/test_exchange_api.c b/src/testing/test_exchange_api.c
index 75e3d480f..e410b1805 100644
--- a/src/testing/test_exchange_api.c
+++ b/src/testing/test_exchange_api.c
@@ -841,6 +841,12 @@ run (void *cls,
                               MHD_HTTP_OK,
                               "recoup-withdraw-coin-2a",
                               CONFIG_FILE),
+    /* Check recoup is failing for the coin with the reused coin key */
+    TALER_TESTING_cmd_recoup ("recoup-2x",
+                              MHD_HTTP_CONFLICT,
+                              "withdraw-coin-1x",
+                              NULL,
+                              "EUR:1"),
     TALER_TESTING_cmd_recoup ("recoup-2",
                               MHD_HTTP_OK,
                               "recoup-withdraw-coin-2a",