diff --git a/tests/histogram.rs b/tests/histogram.rs
index d4e3f38..7f09798 100644
--- a/tests/histogram.rs
+++ b/tests/histogram.rs
@@ -565,5 +565,12 @@ fn subtract_underflow_guarded_by_per_value_count_check() {
 fn recorded_only_zeros() {
     let mut h = Histogram::<u64>::new(1).unwrap();
     h += 0;
-    assert_eq!(h.iter_recorded().count(), 1);
+    // Do not simplify .collect::<Vec<_>>().len() to .count()
+    // This check a bug where .count() and .collect::<Vec<_>>().len()
+    // are different
+    assert_eq!(h.iter_recorded().collect::<Vec<_>>().len(), 1);
+    assert_eq!(
+        h.iter_recorded().collect::<Vec<_>>().len(),
+        h.iter_recorded().count()
+    );
 }