diff --git a/src/ap/dpp_hostapd.c b/src/ap/dpp_hostapd.c
index d956be928..6239bebe5 100644
--- a/src/ap/dpp_hostapd.c
+++ b/src/ap/dpp_hostapd.c
@@ -1833,6 +1833,13 @@ skip_connector:
 		}
 #endif /* CONFIG_DPP3 */
 
+#ifdef CONFIG_TESTING_OPTIONS
+	if (dpp_test == DPP_TEST_INVALID_PROTOCOL_VERSION_PEER_DISC_RESP) {
+		wpa_printf(MSG_INFO, "DPP: TESTING - invalid Protocol Version");
+		ver = 1;
+	}
+#endif /* CONFIG_TESTING_OPTIONS */
+
 		/* Protocol Version */
 		wpabuf_put_le16(msg, DPP_ATTR_PROTOCOL_VERSION);
 		wpabuf_put_le16(msg, 1);
diff --git a/src/common/dpp.h b/src/common/dpp.h
index ca33fe35c..ca488f391 100644
--- a/src/common/dpp.h
+++ b/src/common/dpp.h
@@ -500,6 +500,8 @@ enum dpp_test_behavior {
 	DPP_TEST_REJECT_CONFIG = 91,
 	DPP_TEST_NO_PROTOCOL_VERSION_PEER_DISC_REQ = 92,
 	DPP_TEST_NO_PROTOCOL_VERSION_PEER_DISC_RESP = 93,
+	DPP_TEST_INVALID_PROTOCOL_VERSION_PEER_DISC_REQ = 94,
+	DPP_TEST_INVALID_PROTOCOL_VERSION_PEER_DISC_RESP = 95,
 };
 
 extern enum dpp_test_behavior dpp_test;
diff --git a/wpa_supplicant/dpp_supplicant.c b/wpa_supplicant/dpp_supplicant.c
index aab94cbf4..b8c7a6712 100644
--- a/wpa_supplicant/dpp_supplicant.c
+++ b/wpa_supplicant/dpp_supplicant.c
@@ -3369,6 +3369,13 @@ skip_connector:
 		}
 #endif /* CONFIG_DPP3 */
 
+#ifdef CONFIG_TESTING_OPTIONS
+	if (dpp_test == DPP_TEST_INVALID_PROTOCOL_VERSION_PEER_DISC_REQ) {
+		wpa_printf(MSG_INFO, "DPP: TESTING - invalid Protocol Version");
+		ver = 1;
+	}
+#endif /* CONFIG_TESTING_OPTIONS */
+
 		/* Protocol Version */
 		wpabuf_put_le16(msg, DPP_ATTR_PROTOCOL_VERSION);
 		wpabuf_put_le16(msg, 1);