diff --git a/Project.toml b/Project.toml
index ed069381d..01f3b9812 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,6 +19,8 @@ SpecialFunctions = "0.7.0"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
+Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
 [targets]
-test = ["Test"]
+test = ["Test", "Printf", "Dates"]