diff --git a/src/util/test_helper_eddsa.conf b/src/util/test_helper_eddsa.conf
index 99528579a..f98bff962 100644
--- a/src/util/test_helper_eddsa.conf
+++ b/src/util/test_helper_eddsa.conf
@@ -1,3 +1,7 @@
+[PATHS]
+# Persistent data storage for the testcase
+TALER_TEST_HOME = test_helper_eddsa_home/
+
 [taler-helper-crypto-eddsa]
 LOOKAHEAD_SIGN = 5 minutes
 OVERLAP_DURATION = 1 s
diff --git a/src/util/test_helper_rsa.conf b/src/util/test_helper_rsa.conf
index f45fe0142..cfd3b3013 100644
--- a/src/util/test_helper_rsa.conf
+++ b/src/util/test_helper_rsa.conf
@@ -1,3 +1,8 @@
+[PATHS]
+# Persistent data storage for the testcase
+TALER_TEST_HOME = test_helper_rsa_home/
+
+
 [coin_1]
 DURATION_WITHDRAW = 1 minute
 RSA_KEYSIZE = 2048