diff --git a/api/server/pom.xml b/api/server/pom.xml
index 807a9d5..a04b0e3 100644
--- a/api/server/pom.xml
+++ b/api/server/pom.xml
@@ -1,126 +1,132 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>org.softwareheritage.graph</groupId>
     <artifactId>graph</artifactId>
     <version>1.0-ALPHA</version>
 
     <name>graph</name>
     <url>https://www.softwareheritage.org/</url>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.release>11</maven.compiler.release>
     </properties>
 
     <dependencies>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <version>4.11</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest</artifactId>
+            <version>2.1</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>io.javalin</groupId>
             <artifactId>javalin</artifactId>
             <version>2.8.0</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-simple</artifactId>
             <version>1.7.26</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
             <version>2.9.8</version>
         </dependency>
         <dependency>
             <groupId>it.unimi.dsi</groupId>
             <artifactId>webgraph-big</artifactId>
             <version>3.5.0</version>
         </dependency>
         <dependency>
             <groupId>it.unimi.dsi</groupId>
             <artifactId>fastutil</artifactId>
             <version>8.2.2</version>
         </dependency>
     </dependencies>
 
     <build>
         <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
             <plugins>
                 <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
                 <plugin>
                     <artifactId>maven-clean-plugin</artifactId>
                     <version>3.1.0</version>
                 </plugin>
                 <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
                 <plugin>
                     <artifactId>maven-resources-plugin</artifactId>
                     <version>3.0.2</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-compiler-plugin</artifactId>
                     <version>3.8.0</version>
                     <configuration>
                         <compilerArgs>
                             <arg>-verbose</arg>
                             <arg>-Xlint:all</arg>
                         </compilerArgs>
                     </configuration>
                 </plugin>
                 <plugin>
                     <artifactId>maven-surefire-plugin</artifactId>
                     <version>2.22.1</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-jar-plugin</artifactId>
                     <version>3.0.2</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-install-plugin</artifactId>
                     <version>2.5.2</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-deploy-plugin</artifactId>
                     <version>2.8.2</version>
                 </plugin>
                 <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
                 <plugin>
                     <artifactId>maven-site-plugin</artifactId>
                     <version>3.7.1</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-project-info-reports-plugin</artifactId>
                     <version>3.0.0</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-assembly-plugin</artifactId>
                     <configuration>
                         <archive>
                             <manifest>
                                 <mainClass>org.softwareheritage.graph.App</mainClass>
                             </manifest>
                         </archive>
                         <descriptorRefs>
                             <descriptorRef>jar-with-dependencies</descriptorRef>
                         </descriptorRefs>
                     </configuration>
                     <executions>
                         <execution>
                             <id>make-assembly</id> <!-- this is used for inheritance merges -->
                             <phase>package</phase> <!-- bind to the packaging phase -->
                             <goals>
                                 <goal>single</goal>
                             </goals>
                         </execution>
                     </executions>
                 </plugin>
             </plugins>
         </pluginManagement>
     </build>
 </project>
diff --git a/api/server/src/test/java/org/softwareheritage/graph/VisitTest.java b/api/server/src/test/java/org/softwareheritage/graph/VisitTest.java
index 9ed036f..ad1f5a6 100644
--- a/api/server/src/test/java/org/softwareheritage/graph/VisitTest.java
+++ b/api/server/src/test/java/org/softwareheritage/graph/VisitTest.java
@@ -1,154 +1,159 @@
 package org.softwareheritage.graph;
 
 import java.util.ArrayList;
 
 import org.junit.Assert;
 import org.junit.Test;
+import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
 
 import org.softwareheritage.graph.Graph;
 import org.softwareheritage.graph.GraphTest;
 import org.softwareheritage.graph.SwhId;
 import org.softwareheritage.graph.SwhPath;
 import org.softwareheritage.graph.algo.Visit;
 
 public class VisitTest extends GraphTest {
+  void assertEqualPaths(ArrayList<SwhPath> expecteds, ArrayList<SwhPath> actuals) {
+    Assert.assertThat(expecteds, containsInAnyOrder(actuals.toArray()));
+  }
+
   @Test
   public void dfsForwardFromRoot() {
     Graph graph = getGraph();
     SwhId start = new SwhId("swh:1:dir:0000000000000000000000000000000000000001");
     Visit visit = new Visit(graph, start, "all", "dfs", "forward");
     ArrayList<SwhPath> paths = visit.getPaths();
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000001",
           "swh:1:dir:0000000000000000000000000000000000000008",
           "swh:1:cnt:0000000000000000000000000000000000000009"
         ));
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000001",
           "swh:1:cnt:0000000000000000000000000000000000000010"
         ));
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000001",
           "swh:1:dir:0000000000000000000000000000000000000002",
           "swh:1:dir:0000000000000000000000000000000000000005",
           "swh:1:cnt:0000000000000000000000000000000000000006"
         ));
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000001",
           "swh:1:dir:0000000000000000000000000000000000000002",
           "swh:1:cnt:0000000000000000000000000000000000000007"
         ));
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000001",
           "swh:1:dir:0000000000000000000000000000000000000002",
           "swh:1:dir:0000000000000000000000000000000000000003",
           "swh:1:cnt:0000000000000000000000000000000000000004"
         ));
 
-    Assert.assertEquals(expectedPaths, paths);
+    assertEqualPaths(expectedPaths, paths);
   }
 
   @Test
   public void dfsForwardFromMiddle() {
     Graph graph = getGraph();
     SwhId start = new SwhId("swh:1:dir:0000000000000000000000000000000000000002");
     Visit visit = new Visit(graph, start, "all", "dfs", "forward");
     ArrayList<SwhPath> paths = visit.getPaths();
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000002",
           "swh:1:dir:0000000000000000000000000000000000000005",
           "swh:1:cnt:0000000000000000000000000000000000000006"
         ));
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000002",
           "swh:1:cnt:0000000000000000000000000000000000000007"
         ));
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000002",
           "swh:1:dir:0000000000000000000000000000000000000003",
           "swh:1:cnt:0000000000000000000000000000000000000004"
         ));
 
-    Assert.assertEquals(expectedPaths, paths);
+    assertEqualPaths(expectedPaths, paths);
   }
 
   @Test
   public void dfsForwardFromLeaf() {
     Graph graph = getGraph();
     SwhId start = new SwhId("swh:1:cnt:0000000000000000000000000000000000000006");
     Visit visit = new Visit(graph, start, "all", "dfs", "forward");
     ArrayList<SwhPath> paths = visit.getPaths();
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
         new SwhPath(
           "swh:1:cnt:0000000000000000000000000000000000000006"
         ));
 
-    Assert.assertEquals(expectedPaths, paths);
+    assertEqualPaths(expectedPaths, paths);
   }
 
   @Test
   public void dfsBackwardFromRoot() {
     Graph graph = getGraph();
     SwhId start = new SwhId("swh:1:dir:0000000000000000000000000000000000000001");
     Visit visit = new Visit(graph, start, "all", "dfs", "backward");
     ArrayList<SwhPath> paths = visit.getPaths();
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000001"
         ));
 
-    Assert.assertEquals(expectedPaths, paths);
+    assertEqualPaths(expectedPaths, paths);
   }
 
   @Test
   public void dfsBackwardFromMiddle() {
     Graph graph = getGraph();
     SwhId start = new SwhId("swh:1:dir:0000000000000000000000000000000000000008");
     Visit visit = new Visit(graph, start, "all", "dfs", "backward");
     ArrayList<SwhPath> paths = visit.getPaths();
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
         new SwhPath(
           "swh:1:dir:0000000000000000000000000000000000000008",
           "swh:1:dir:0000000000000000000000000000000000000001"
         ));
 
-    Assert.assertEquals(expectedPaths, paths);
+    assertEqualPaths(expectedPaths, paths);
   }
 
   @Test
   public void dfsBackwardFromLeaf() {
     Graph graph = getGraph();
     SwhId start = new SwhId("swh:1:cnt:0000000000000000000000000000000000000006");
     Visit visit = new Visit(graph, start, "all", "dfs", "backward");
     ArrayList<SwhPath> paths = visit.getPaths();
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
         new SwhPath(
           "swh:1:cnt:0000000000000000000000000000000000000006",
           "swh:1:dir:0000000000000000000000000000000000000005",
           "swh:1:dir:0000000000000000000000000000000000000002",
           "swh:1:dir:0000000000000000000000000000000000000001"
         ));
 
-    Assert.assertEquals(expectedPaths, paths);
+    assertEqualPaths(expectedPaths, paths);
   }
 }