diff --git a/pixi.toml b/pixi.toml
index 632445a8a..d5c8da2dd 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -47,4 +47,5 @@ features = ["test"]
 [feature.test.dependencies]
 pytest = "*"
 pcaspy = "*"
-pyepics = "*"
\ No newline at end of file
+pyepics = "*"
+time-machine = "*"
\ No newline at end of file