diff --git a/data/ecosystems/c/casperlabs.toml b/data/ecosystems/c/casperlabs.toml
index a40d114a..b977f0df 100644
--- a/data/ecosystems/c/casperlabs.toml
+++ b/data/ecosystems/c/casperlabs.toml
@@ -48,5 +48,8 @@ url = "https://github.com/CasperLabs/homebrew-CasperLabs"
 [[repo]]
 url = "https://github.com/CasperLabs/sfbw-2019"
 
+[[repo]]
+url = "https://github.com/CasperLabs/stests"
+
 [[repo]]
 url = "https://github.com/CasperLabs/terraform-aws-vpc-peering"