diff --git a/solver/src/test/java/org/chocosolver/solver/search/loop/monitors/GephiNetworkTest.java b/solver/src/test/java/org/chocosolver/solver/search/loop/monitors/GephiNetworkTest.java
index 62a52e9197..3c2018cafe 100644
--- a/solver/src/test/java/org/chocosolver/solver/search/loop/monitors/GephiNetworkTest.java
+++ b/solver/src/test/java/org/chocosolver/solver/search/loop/monitors/GephiNetworkTest.java
@@ -15,6 +15,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
 
 /**
  * <p>
@@ -28,15 +29,15 @@ public class GephiNetworkTest {
     @Test(groups = "1s", timeOut = 60000)
     public void test1() throws IOException {
         Model s1 = ProblemMaker.makeCostasArrays(7);
-        File temp = File.createTempFile("tmp", ".gexf");
+        File temp = Files.createTempFile("tmp", ".gexf").toFile();
         s1.getSolver().constraintNetworkToGephi(temp.getAbsolutePath());
     }
 
     @Test(groups = "1s", timeOut = 60000)
     public void test2() throws IOException {
         Model s1 = ProblemMaker.makeGolombRuler(11);
-        File temp = File.createTempFile("tmp", ".gexf");
+        File temp = Files.createTempFile("tmp", ".gexf").toFile();
         s1.getSolver().constraintNetworkToGephi(temp.getAbsolutePath());
     }
 
-}
\ No newline at end of file
+}