diff --git a/src/tests/unit-tests/signal-processing-blocks/pvt/serdes_monitor_pvt_test.cc b/src/tests/unit-tests/signal-processing-blocks/pvt/serdes_monitor_pvt_test.cc
index c22c6f595..5cfca59d5 100644
--- a/src/tests/unit-tests/signal-processing-blocks/pvt/serdes_monitor_pvt_test.cc
+++ b/src/tests/unit-tests/signal-processing-blocks/pvt/serdes_monitor_pvt_test.cc
@@ -31,17 +31,33 @@ TEST(Serdes_Monitor_Pvt_Test, Simpletest)
     mon.ParseFromString(serialized_data);
     double read_latitude = mon.latitude();
     EXPECT_NEAR(true_latitude, read_latitude, 0.000001);
+}
 
+
+TEST(Serdes_Monitor_Pvt_Test, GalileoEphemerisSerdes)
+{
     auto eph = std::make_shared<Galileo_Ephemeris>();
     int true_tow = 12345;
     eph->tow = true_tow;
 
     Serdes_Galileo_Eph gal_serdes = Serdes_Galileo_Eph();
-    serialized_data = gal_serdes.createProtobuffer(eph);
+    std::string serialized_data = gal_serdes.createProtobuffer(eph);
 
     gnss_sdr::GalileoEphemeris ephgal;
     ephgal.ParseFromString(serialized_data);
 
+    double true_delta_n = 0.33;
+    ephgal.set_delta_n(true_delta_n);
+
     int read_tow = ephgal.tow();
     EXPECT_EQ(true_tow, read_tow);
+
+    double read_delta_n = ephgal.delta_n();
+    EXPECT_NEAR(true_delta_n, read_delta_n, 0.000001);
+
+    auto eph2 = gal_serdes.readProtobuffer(ephgal);
+    double read2_delta_n = eph2.delta_n;
+    int read2_tow = eph2.tow;
+    EXPECT_EQ(true_tow, read2_tow);
+    EXPECT_NEAR(true_delta_n, read2_delta_n, 0.000001);
 }