diff --git a/crates/turborepo-lib/src/task_hash.rs b/crates/turborepo-lib/src/task_hash.rs
index 028cb1c8fa173..a1f0db782ba7d 100644
--- a/crates/turborepo-lib/src/task_hash.rs
+++ b/crates/turborepo-lib/src/task_hash.rs
@@ -469,6 +469,7 @@ impl<'a> TaskHasher<'a> {
                         "LANG",
                         "SHELL",
                         "PWD",
+                        "CI",
                         "NODE_OPTIONS",
                         // Vercel specific
                         "VERCEL_*",