diff --git a/agb/src/lib.rs b/agb/src/lib.rs
index 063090e2..c4e57618 100644
--- a/agb/src/lib.rs
+++ b/agb/src/lib.rs
@@ -289,9 +289,9 @@ pub mod test_runner {
                 mgba::DebugLevel::Info,
             )
             .unwrap();
-            mgba::number_of_cycles_tagged(785);
+            mgba::test_runner_measure_cycles();
             self(gba);
-            mgba::number_of_cycles_tagged(785);
+            mgba::test_runner_measure_cycles();
 
             assert!(
                 unsafe { agb_alloc::number_of_blocks() } < 2,
diff --git a/agb/src/mgba.rs b/agb/src/mgba.rs
index 5104fd7d..348df783 100644
--- a/agb/src/mgba.rs
+++ b/agb/src/mgba.rs
@@ -28,8 +28,8 @@ fn is_running_in_mgba() -> bool {
 
 const NUMBER_OF_CYCLES: MemoryMapped<u16> = unsafe { MemoryMapped::new(0x04FF_F800) };
 
-pub fn number_of_cycles_tagged(tag: u16) {
-    NUMBER_OF_CYCLES.set(tag);
+pub(crate) fn test_runner_measure_cycles() {
+    NUMBER_OF_CYCLES.set(0);
 }
 
 pub struct Mgba {