diff --git a/libgnucash/app-utils/test/gtest-gnc-option.cpp b/libgnucash/app-utils/test/gtest-gnc-option.cpp
index e4667d7f10..d715c268ee 100644
--- a/libgnucash/app-utils/test/gtest-gnc-option.cpp
+++ b/libgnucash/app-utils/test/gtest-gnc-option.cpp
@@ -936,6 +936,7 @@ TEST_F(GncOptionAccountTest, test_account_list_from_scheme)
                                                GncOptionAccountTypeList{ACCT_TYPE_BANK}}};
     GncOptionAccountList acclistbad{list_of_types({ACCT_TYPE_STOCK})};
     acc_guids = make_account_list_SCM_str(acclistbad);
+    iss.clear();
     iss.str(acc_guids);
     sel_option.from_scheme(iss);
     EXPECT_EQ(accsel, sel_option.get_value<GncOptionAccountList>());