diff --git a/test/REQUIRE b/test/REQUIRE
index 6cd6a973..a11706d9 100644
--- a/test/REQUIRE
+++ b/test/REQUIRE
@@ -2,6 +2,7 @@ StatPlots
 Images
 ImageMagick
 @osx QuartzImageIO
+FileIO
 GR 0.31.0
 RDatasets
 VisualRegressionTests