diff --git a/src/cfg.rs b/src/cfg.rs
index 3a57e22..a93679a 100644
--- a/src/cfg.rs
+++ b/src/cfg.rs
@@ -93,6 +93,7 @@ pub mod cell {
         };
 
         #[cfg(all(loom, test))]
+        #[cfg(not(tarpaulin_include))]
         fn null_mut() -> Cell<*mut Self::Target> {
             Self::new(core::ptr::null_mut())
         }