diff --git a/java/server/src/test/java/org/softwareheritage/graph/GraphTest.java b/java/server/src/test/java/org/softwareheritage/graph/GraphTest.java
index b58a540..9355989 100644
--- a/java/server/src/test/java/org/softwareheritage/graph/GraphTest.java
+++ b/java/server/src/test/java/org/softwareheritage/graph/GraphTest.java
@@ -1,30 +1,30 @@
 package org.softwareheritage.graph;
 
 import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Collection;
 
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
 
 import org.softwareheritage.graph.Graph;
 
 public class GraphTest {
     static Graph graph;
 
     public static <T> void assertEqualsAnyOrder(Collection<T> expecteds, Collection<T> actuals) {
         Assert.assertThat(expecteds, containsInAnyOrder(actuals.toArray()));
     }
 
     @BeforeClass
     public static void setUp() throws IOException {
-        Path graphPath = Paths.get("src", "test", "dataset", "output", "example");
+        Path graphPath = Paths.get("..", "..", "tests", "dataset", "output", "example");
         graph = new Graph(graphPath.toString());
     }
 
     public Graph getGraph() {
         return graph;
     }
 }
diff --git a/java/server/src/test/dataset/.gitignore b/tests/dataset/.gitignore
similarity index 100%
rename from java/server/src/test/dataset/.gitignore
rename to tests/dataset/.gitignore
diff --git a/java/server/src/test/dataset/example.edges.csv b/tests/dataset/example.edges.csv
similarity index 100%
rename from java/server/src/test/dataset/example.edges.csv
rename to tests/dataset/example.edges.csv
diff --git a/java/server/src/test/dataset/example.edges.csv.gz b/tests/dataset/example.edges.csv.gz
similarity index 100%
rename from java/server/src/test/dataset/example.edges.csv.gz
rename to tests/dataset/example.edges.csv.gz
diff --git a/java/server/src/test/dataset/example.nodes.csv b/tests/dataset/example.nodes.csv
similarity index 100%
rename from java/server/src/test/dataset/example.nodes.csv
rename to tests/dataset/example.nodes.csv
diff --git a/java/server/src/test/dataset/example.nodes.csv.gz b/tests/dataset/example.nodes.csv.gz
similarity index 100%
rename from java/server/src/test/dataset/example.nodes.csv.gz
rename to tests/dataset/example.nodes.csv.gz
diff --git a/java/server/src/test/dataset/generate_graph.sh b/tests/dataset/generate_graph.sh
similarity index 100%
rename from java/server/src/test/dataset/generate_graph.sh
rename to tests/dataset/generate_graph.sh
diff --git a/java/server/src/test/dataset/img/.gitignore b/tests/dataset/img/.gitignore
similarity index 100%
rename from java/server/src/test/dataset/img/.gitignore
rename to tests/dataset/img/.gitignore
diff --git a/java/server/src/test/dataset/img/Makefile b/tests/dataset/img/Makefile
similarity index 100%
rename from java/server/src/test/dataset/img/Makefile
rename to tests/dataset/img/Makefile
diff --git a/java/server/src/test/dataset/img/example.dot b/tests/dataset/img/example.dot
similarity index 100%
rename from java/server/src/test/dataset/img/example.dot
rename to tests/dataset/img/example.dot
diff --git a/java/server/src/test/dataset/output/example-transposed.graph b/tests/dataset/output/example-transposed.graph
similarity index 100%
rename from java/server/src/test/dataset/output/example-transposed.graph
rename to tests/dataset/output/example-transposed.graph
diff --git a/java/server/src/test/dataset/output/example-transposed.obl b/tests/dataset/output/example-transposed.obl
similarity index 100%
rename from java/server/src/test/dataset/output/example-transposed.obl
rename to tests/dataset/output/example-transposed.obl
diff --git a/java/server/src/test/dataset/output/example-transposed.offsets b/tests/dataset/output/example-transposed.offsets
similarity index 100%
rename from java/server/src/test/dataset/output/example-transposed.offsets
rename to tests/dataset/output/example-transposed.offsets
diff --git a/java/server/src/test/dataset/output/example-transposed.properties b/tests/dataset/output/example-transposed.properties
similarity index 100%
rename from java/server/src/test/dataset/output/example-transposed.properties
rename to tests/dataset/output/example-transposed.properties
diff --git a/java/server/src/test/dataset/output/example.graph b/tests/dataset/output/example.graph
similarity index 100%
rename from java/server/src/test/dataset/output/example.graph
rename to tests/dataset/output/example.graph
diff --git a/java/server/src/test/dataset/output/example.indegree b/tests/dataset/output/example.indegree
similarity index 100%
rename from java/server/src/test/dataset/output/example.indegree
rename to tests/dataset/output/example.indegree
diff --git a/java/server/src/test/dataset/output/example.mph b/tests/dataset/output/example.mph
similarity index 100%
rename from java/server/src/test/dataset/output/example.mph
rename to tests/dataset/output/example.mph
diff --git a/tests/dataset/output/example.node2pid.bin b/tests/dataset/output/example.node2pid.bin
new file mode 100644
index 0000000..7755043
Binary files /dev/null and b/tests/dataset/output/example.node2pid.bin differ
diff --git a/java/server/src/test/dataset/output/example.node2pid.csv b/tests/dataset/output/example.node2pid.csv
similarity index 100%
rename from java/server/src/test/dataset/output/example.node2pid.csv
rename to tests/dataset/output/example.node2pid.csv
diff --git a/java/server/src/test/dataset/output/example.node2type.map b/tests/dataset/output/example.node2type.map
similarity index 100%
rename from java/server/src/test/dataset/output/example.node2type.map
rename to tests/dataset/output/example.node2type.map
diff --git a/java/server/src/test/dataset/output/example.obl b/tests/dataset/output/example.obl
similarity index 100%
rename from java/server/src/test/dataset/output/example.obl
rename to tests/dataset/output/example.obl
diff --git a/java/server/src/test/dataset/output/example.offsets b/tests/dataset/output/example.offsets
similarity index 100%
rename from java/server/src/test/dataset/output/example.offsets
rename to tests/dataset/output/example.offsets
diff --git a/java/server/src/test/dataset/output/example.order b/tests/dataset/output/example.order
similarity index 100%
rename from java/server/src/test/dataset/output/example.order
rename to tests/dataset/output/example.order
diff --git a/java/server/src/test/dataset/output/example.outdegree b/tests/dataset/output/example.outdegree
similarity index 100%
rename from java/server/src/test/dataset/output/example.outdegree
rename to tests/dataset/output/example.outdegree
diff --git a/tests/dataset/output/example.pid2node.bin b/tests/dataset/output/example.pid2node.bin
new file mode 100644
index 0000000..753264c
Binary files /dev/null and b/tests/dataset/output/example.pid2node.bin differ
diff --git a/java/server/src/test/dataset/output/example.pid2node.csv b/tests/dataset/output/example.pid2node.csv
similarity index 100%
rename from java/server/src/test/dataset/output/example.pid2node.csv
rename to tests/dataset/output/example.pid2node.csv
diff --git a/java/server/src/test/dataset/output/example.properties b/tests/dataset/output/example.properties
similarity index 100%
rename from java/server/src/test/dataset/output/example.properties
rename to tests/dataset/output/example.properties
diff --git a/java/server/src/test/dataset/output/example.stats b/tests/dataset/output/example.stats
similarity index 100%
rename from java/server/src/test/dataset/output/example.stats
rename to tests/dataset/output/example.stats