diff --git a/R/git-auth.R b/R/git-auth.R
index 609bf819..ab49842e 100644
--- a/R/git-auth.R
+++ b/R/git-auth.R
@@ -1,4 +1,6 @@
 
+# nocov start
+
 gitcreds_get <- NULL
 gitcreds_set <- NULL
 gitcreds_delete <- NULL
@@ -465,7 +467,8 @@ gitcreds_env <- function() {
   c(
     GCM_INTERACTIVE = "Never",
     GCM_MODAL_PROMPT = "false",
-    GCM_VALIDATE = "false"
+    GCM_VALIDATE = "false",
+    GCM_GUI_PROMPT = "false"
   )
 }
 
@@ -812,3 +815,5 @@ read_file <- function(path, ...) {
 
 environment()
 })
+
+# nocov end