diff --git a/UNITTESTS/features/lorawan/loramac/Test_LoRaMac.cpp b/UNITTESTS/features/lorawan/loramac/Test_LoRaMac.cpp
index 2abe1cb4e6..04f0c3b91d 100644
--- a/UNITTESTS/features/lorawan/loramac/Test_LoRaMac.cpp
+++ b/UNITTESTS/features/lorawan/loramac/Test_LoRaMac.cpp
@@ -77,6 +77,9 @@ TEST_F(Test_LoRaMac, initialize)
     conn.connection_u.otaa.nb_trials = 2;
     object->prepare_join(&conn, true);
 
+    channel_params_t params[] = {868300000, 0, { ((DR_5 << 4) | DR_0) }, 1};
+    LoRaPHY_stub::channel_params_ptr = params;
+
     LoRaWANTimer_stub::call_cb_immediately = true;
     EXPECT_TRUE(LORAWAN_STATUS_OK == object->initialize(NULL, my_cb));
 }
diff --git a/UNITTESTS/stubs/LoRaPHY_stub.cpp b/UNITTESTS/stubs/LoRaPHY_stub.cpp
index 5c0f8f53ec..1cb6542042 100644
--- a/UNITTESTS/stubs/LoRaPHY_stub.cpp
+++ b/UNITTESTS/stubs/LoRaPHY_stub.cpp
@@ -416,4 +416,8 @@ uint8_t LoRaPHY::apply_DR_offset(int8_t dr, int8_t dr_offset)
     return LoRaPHY_stub::uint8_value;
 }
 
+uint32_t LoRaPHY::get_rx_time_on_air(uint8_t modem, uint16_t pkt_len)
+{
+    return LoRaPHY_stub::uint32_value;
+}