diff --git a/.gitignore b/.gitignore
index 8b51124..4df30b3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,5 @@
 /config.mk
 *autoloads.el
 test/test-project/target
-test/test-project-single-crate/target
\ No newline at end of file
+test/test-project-single-crate/target
+.env
diff --git a/rustic-cargo.el b/rustic-cargo.el
index 71bfca3..cae371d 100644
--- a/rustic-cargo.el
+++ b/rustic-cargo.el
@@ -37,7 +37,7 @@
 
 (defcustom rustic-cargo-nextest-exec-command (list "nextest" "run")
   "Execute command to run nextest."
-  :type 'string
+  :type '(repeat string)
   :group 'rustic-cargo)
 
 (defcustom rustic-cargo-run-exec-command "run"