diff --git a/src/rcc/pll.rs b/src/rcc/pll.rs
index 028e7c79..de6f651e 100644
--- a/src/rcc/pll.rs
+++ b/src/rcc/pll.rs
@@ -439,6 +439,10 @@ mod tests {
                 pllcfgr: MockPllCfgr {},
             }
         }
+
+        pub fn pllcfgr(&self) -> &MockPllCfgr {
+            &self.pllcfgr
+        }
     }
 
     #[test]