diff --git a/src/env.rs b/src/env.rs
index 0a61077..2636d08 100644
--- a/src/env.rs
+++ b/src/env.rs
@@ -22,9 +22,9 @@ impl Update {
     }
 }
 
-/// Function that examines the `TRYBUILD_OFFLINE_MODE` environment variable and
-/// returns a boolean indicating whether or not the `--offline` option should be
-/// passed to cargo.
+/// Function that examines the `TRYBUILD_NO_OFFLINE_MODE` environment variable
+/// and returns a boolean indicating whether or not the `--offline` option
+/// should be passed to cargo.
 pub(crate) fn use_offline_mode() -> bool {
     // if the environment variable is set (we don't care what value), then
     // offline mode should be disabled. Otherwise, it should be enabled (the