diff --git a/computer/computer-test/src/main/java/org/apache/hugegraph/computer/core/sort/SorterTestUtil.java b/computer/computer-test/src/main/java/org/apache/hugegraph/computer/core/sort/SorterTestUtil.java
index aa7882083..30cc9f295 100644
--- a/computer/computer-test/src/main/java/org/apache/hugegraph/computer/core/sort/SorterTestUtil.java
+++ b/computer/computer-test/src/main/java/org/apache/hugegraph/computer/core/sort/SorterTestUtil.java
@@ -34,6 +34,7 @@
 import org.apache.hugegraph.computer.core.io.BytesInput;
 import org.apache.hugegraph.computer.core.io.BytesOutput;
 import org.apache.hugegraph.computer.core.io.IOFactory;
+import org.apache.hugegraph.computer.core.io.Readable;
 import org.apache.hugegraph.computer.core.io.Writable;
 import org.apache.hugegraph.computer.core.store.StoreTestUtil;
 import org.apache.hugegraph.computer.core.store.entry.EntriesUtil;