diff --git a/open-reac/src/test/java/com/powsybl/openreac/optimization/AbstractOpenReacRunnerTest.java b/open-reac/src/test/java/com/powsybl/openreac/optimization/AbstractOpenReacRunnerTest.java
index a53d9720..c539f9b6 100644
--- a/open-reac/src/test/java/com/powsybl/openreac/optimization/AbstractOpenReacRunnerTest.java
+++ b/open-reac/src/test/java/com/powsybl/openreac/optimization/AbstractOpenReacRunnerTest.java
@@ -29,7 +29,6 @@
 import java.io.InputStream;
 import java.nio.file.FileSystem;
 import java.nio.file.Path;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 import java.util.concurrent.ForkJoinPool;
@@ -86,6 +85,8 @@ protected void testAllModifAndLoadFlow(Network network, String subFolder, OpenRe
      */
     void runAndApplyAllModifications(Network network, String subFolder, OpenReacParameters parameters,
                                      boolean updateNetworkWithVoltages, ReportNode reportNode) throws IOException {
+        // set default voltage limits to every voltage levels of the network
+        setDefaultVoltageLimits(network);
         LocalCommandExecutor localCommandExecutor = new TestLocalCommandExecutor(
                 List.of(subFolder + "/reactiveopf_results_generators.csv",
                         subFolder + "/reactiveopf_results_indic.txt",
diff --git a/open-reac/src/test/java/com/powsybl/openreac/optimization/OpenReacOptimizationAndLoadFlowTest.java b/open-reac/src/test/java/com/powsybl/openreac/optimization/OpenReacOptimizationAndLoadFlowTest.java
index 89eba645..25632d0d 100644
--- a/open-reac/src/test/java/com/powsybl/openreac/optimization/OpenReacOptimizationAndLoadFlowTest.java
+++ b/open-reac/src/test/java/com/powsybl/openreac/optimization/OpenReacOptimizationAndLoadFlowTest.java
@@ -14,8 +14,6 @@
 import com.powsybl.computation.local.LocalComputationManager;
 import com.powsybl.ieeecdf.converter.IeeeCdfNetworkFactory;
 import com.powsybl.iidm.network.*;
-import com.powsybl.loadflow.LoadFlow;
-import com.powsybl.loadflow.LoadFlowResult;
 import com.powsybl.openreac.OpenReacConfig;
 import com.powsybl.openreac.OpenReacRunner;
 import com.powsybl.openreac.network.HvdcNetworkFactory;
@@ -189,9 +187,6 @@ void testWarmStart() throws IOException {
         assertEquals(0, network.getBusBreakerView().getBus("BUS_2").getAngle());
         assertEquals(22.935, network.getBusBreakerView().getBus("BUS_3").getV());
         assertEquals(-4.698, network.getBusBreakerView().getBus("BUS_3").getAngle(), 0.001);
-
-        LoadFlowResult loadFlowResult = LoadFlow.run(network);
-        assertTrue(loadFlowResult.isFullyConverged());
     }
 
     public static Network create() {