diff --git a/poi-ooxml/src/test/java9/module-info.java b/poi-ooxml/src/test/java9/module-info.java
index 3d7eb6d212b..ce3df2f039b 100644
--- a/poi-ooxml/src/test/java9/module-info.java
+++ b/poi-ooxml/src/test/java9/module-info.java
@@ -21,6 +21,7 @@ Licensed to the Apache Software Foundation (ASF) under one or more
     requires transitive org.apache.poi.ooxml.schemas;
     requires org.apache.commons.collections4;
     requires org.apache.commons.codec;
+    requires org.apache.commons.io;
     requires commons.math3;
     requires com.zaxxer.sparsebitset;
     requires org.apache.logging.log4j;
diff --git a/poi/src/test/java9/module-info.java b/poi/src/test/java9/module-info.java
index 55c3b22aee5..144f449872a 100644
--- a/poi/src/test/java9/module-info.java
+++ b/poi/src/test/java9/module-info.java
@@ -18,6 +18,7 @@ Licensed to the Apache Software Foundation (ASF) under one or more
 module org.apache.poi.poi {
     requires org.apache.commons.collections4;
     requires org.apache.commons.codec;
+    requires org.apache.commons.io;
     requires commons.math3;
     requires com.zaxxer.sparsebitset;
     requires org.apache.logging.log4j;