diff --git a/src/main/java/org/gridsuite/modification/server/modifications/VscModification.java b/src/main/java/org/gridsuite/modification/server/modifications/VscModification.java
index 9f6b9c913..c03c84575 100644
--- a/src/main/java/org/gridsuite/modification/server/modifications/VscModification.java
+++ b/src/main/java/org/gridsuite/modification/server/modifications/VscModification.java
@@ -83,23 +83,26 @@ private void modifyVsc(@NonNull Network network, @NonNull HvdcLine hvdcLine, Vsc
                     "Angle drop power control"));
         }
 
-        if (modificationInfos.getDroop() != null) {
-            hvdcLine.newExtension(HvdcAngleDroopActivePowerControlAdder.class)
-                    .withDroop(modificationInfos.getDroop().getValue())
-                    .add();
-            reports.add(ModificationUtils.getInstance().buildModificationReport(
-                    "unknown",
-                    modificationInfos.getDroop().getValue(),
-                    "Angle drop power control"));
-        }
-        if (modificationInfos.getP0() != null) {
-            hvdcLine.newExtension(HvdcAngleDroopActivePowerControlAdder.class)
-                    .withP0(modificationInfos.getP0().getValue())
-                    .add();
-            reports.add(ModificationUtils.getInstance().buildModificationReport(
-                    "unknown",
-                    modificationInfos.getP0().getValue(),
-                    "p0"));
+        if (modificationInfos.getDroop() != null ||
+                modificationInfos.getP0() != null) {
+            var activePowerControlExtension = hvdcLine.newExtension(HvdcAngleDroopActivePowerControlAdder.class);
+            activePowerControlExtension.withEnabled(modificationInfos.getAngleDroopActivePowerControl().getValue());
+            if (modificationInfos.getDroop() != null) {
+                activePowerControlExtension.withDroop(modificationInfos.getDroop().getValue());
+                reports.add(ModificationUtils.getInstance().buildModificationReport(
+                        "unknown",
+                        modificationInfos.getDroop().getValue(),
+                        "Angle drop power control"));
+            }
+            if (modificationInfos.getP0() != null) {
+                activePowerControlExtension
+                        .withP0(modificationInfos.getP0().getValue());
+                reports.add(ModificationUtils.getInstance().buildModificationReport(
+                        "unknown",
+                        modificationInfos.getP0().getValue(),
+                        "p0"));
+            }
+            activePowerControlExtension.add();
         }
 
         if (modificationInfos.getOperatorActivePowerLimitFromSide1ToSide2() != null ||
diff --git a/src/test/java/org/gridsuite/modification/server/modifications/VscModificationTest.java b/src/test/java/org/gridsuite/modification/server/modifications/VscModificationTest.java
index 59b1a2b8e..4d1eb09e7 100644
--- a/src/test/java/org/gridsuite/modification/server/modifications/VscModificationTest.java
+++ b/src/test/java/org/gridsuite/modification/server/modifications/VscModificationTest.java
@@ -1,6 +1,5 @@
 package org.gridsuite.modification.server.modifications;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.powsybl.iidm.network.*;
 import com.powsybl.iidm.network.extensions.HvdcAngleDroopActivePowerControl;
@@ -12,13 +11,11 @@
 import org.junit.Test;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Tag;
-import org.springframework.test.web.servlet.MvcResult;
 import org.springframework.util.CollectionUtils;
 
 import java.util.*;
 import java.util.stream.IntStream;
 
-import static org.gridsuite.modification.server.utils.assertions.Assertions.assertThat;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -37,16 +34,16 @@ protected ModificationInfos buildModification() {
                 .equipmentId("hvdcLine")
                 .equipmentName(new AttributeModification<>("hvdcLine", OperationType.SET))
                 .dcNominalVoltage(new AttributeModification<>(39., OperationType.SET))
-               .dcResistance(new AttributeModification<>(4., OperationType.SET))
-               .maximumActivePower(new AttributeModification<>(56., OperationType.SET))
-               .p0(new AttributeModification<>(5F, OperationType.SET))
-               .operatorActivePowerLimitFromSide2ToSide1(new AttributeModification<>(5.6F, OperationType.SET))
-               .convertersMode(new AttributeModification<>(HvdcLine.ConvertersMode.SIDE_1_INVERTER_SIDE_2_RECTIFIER, OperationType.SET))
-               .activePower(new AttributeModification<>(5., OperationType.SET))
-               .operatorActivePowerLimitFromSide1ToSide2(new AttributeModification<>(6.0F, OperationType.SET))
-               .operatorActivePowerLimitFromSide2ToSide1(new AttributeModification<>(8F, OperationType.SET))
-               .droop(new AttributeModification<>(1F, OperationType.SET))
-               .angleDroopActivePowerControl(new AttributeModification<>(false, OperationType.SET))
+                .dcResistance(new AttributeModification<>(4., OperationType.SET))
+                .maximumActivePower(new AttributeModification<>(56., OperationType.SET))
+                .p0(new AttributeModification<>(5F, OperationType.SET))
+                .operatorActivePowerLimitFromSide2ToSide1(new AttributeModification<>(5.6F, OperationType.SET))
+                .convertersMode(new AttributeModification<>(HvdcLine.ConvertersMode.SIDE_1_INVERTER_SIDE_2_RECTIFIER, OperationType.SET))
+                .activePower(new AttributeModification<>(5., OperationType.SET))
+                .operatorActivePowerLimitFromSide1ToSide2(new AttributeModification<>(6.0F, OperationType.SET))
+                .operatorActivePowerLimitFromSide2ToSide1(new AttributeModification<>(8F, OperationType.SET))
+                .droop(new AttributeModification<>(1F, OperationType.SET))
+                .angleDroopActivePowerControl(new AttributeModification<>(true, OperationType.SET))
                 .converterStation1(buildConverterStationWithMinMaxReactiveLimits())
                 .converterStation2(buildConverterStationWithReactiveCapabilityCurve())
                 .build();
@@ -67,6 +64,7 @@ private ConverterStationModificationInfos buildConverterStationWithReactiveCapab
                         new ReactiveCapabilityCurveModificationInfos(0.6, 2., 12., 14., 0.8, 0.11)))
                 .build();
     }
+
     private ConverterStationModificationInfos buildConverterStationWithMinMaxReactiveLimits() {
         return ConverterStationModificationInfos.builder()
                 .equipmentId("v2vsc")
@@ -115,18 +113,16 @@ protected void assertAfterNetworkModificationCreation() {
         assertEquals(5., hvdcLine.getActivePowerSetpoint(), 0);
         assertEquals(56., hvdcLine.getMaxP(), 0);
 
-//TODO(jamal) check p0 and droop
         HvdcOperatorActivePowerRange hvdcOperatorActivePowerRange = hvdcLine.getExtension(HvdcOperatorActivePowerRange.class);
         Assert.assertEquals(6, hvdcOperatorActivePowerRange.getOprFromCS1toCS2(), 0);
         Assert.assertEquals(8, hvdcOperatorActivePowerRange.getOprFromCS2toCS1(), 0);
 
         HvdcAngleDroopActivePowerControl activePowerControl = hvdcLine.getExtension(HvdcAngleDroopActivePowerControl.class);
         Assert.assertEquals(5, activePowerControl.getP0(), 0);
-        //Assert.assertEquals(1, activePowerControl.getDroop(), 0); //FIXME (jamal) : check droop
-
+        Assert.assertEquals(1, activePowerControl.getDroop(), 0);
+        Assert.assertTrue(activePowerControl.isEnabled());
 
         Assert.assertEquals(HvdcLine.ConvertersMode.SIDE_1_INVERTER_SIDE_2_RECTIFIER, hvdcLine.getConvertersMode());
-        //TODO (jamal) : check converter stations
 
         Assert.assertEquals(1, getNetwork().getVoltageLevel("v1").getVscConverterStationStream()
                 .filter(converterStation -> converterStation.getId().equals("v1vsc")).count());
@@ -158,8 +154,6 @@ protected void assertAfterNetworkModificationCreation() {
                             assertEquals(modificationPoint.getP(), point.getP());
                         });
             }
-
-
             Assert.assertEquals(0.3, vscConverterStation1.getVoltageSetpoint(), 0);
             Assert.assertEquals("v1", vscConverterStation1.getTerminal().getVoltageLevel().getId());
         }
@@ -191,26 +185,17 @@ protected void testCreationModificationMessage(ModificationInfos modificationInf
     @Override
     protected void assertAfterNetworkModificationDeletion() {
         assertNull(getNetwork().getHvdcLine("vsc1"));
-//        Assert.assertEquals(0, getNetwork().getVoltageLevel("v1").getVscConverterStationStream()
-//                .filter(converterStation -> converterStation.getId().equals("stationId1")).count());
-//
-//        Assert.assertEquals(0, getNetwork().getVoltageLevel("v2").getVscConverterStationStream()
-//                .filter(converterStation -> converterStation.getId().equals("stationId2")).count());
+        Assert.assertEquals(0, getNetwork().getVoltageLevel("v1").getVscConverterStationStream()
+                .filter(converterStation -> converterStation.getId().equals("stationId1")).count());
+
+        Assert.assertEquals(0, getNetwork().getVoltageLevel("v2").getVscConverterStationStream()
+                .filter(converterStation -> converterStation.getId().equals("stationId2")).count());
     }
 
+
     @Test
-    public void testVscModification() throws JsonProcessingException {
-        MvcResult mvcResult;
-        Optional<NetworkModificationResult> networkModificationResult;
-        ModificationInfos modificationToRead = buildModification();
-
-        UUID modificationUuid = saveModification(modificationToRead);
-        //convert modification to json
-        String resultAsString = mapper.writeValueAsString(modificationToRead);
-        ModificationInfos receivedModification = mapper.readValue(resultAsString, new TypeReference<>() {
-        });
+    public void testDroopUnchanged() throws Exception {
 
-        assertThat(receivedModification).recursivelyEquals(modificationToRead);
     }
 
     @Override