diff --git a/test/Project.toml b/test/Project.toml
index e13ec8d..05ae5c3 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -1,5 +1,4 @@
 [deps]
 IntervalArithmetic = "d1acc4aa-44c8-5952-acd4-ba5d80a2a253"
-IntervalBoxes = "43d83c95-ebbb-40ec-8188-24586a1458ed"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"