diff --git a/src/adaptors/mod.rs b/src/adaptors/mod.rs
index 22f7aa363..52e36c48b 100644
--- a/src/adaptors/mod.rs
+++ b/src/adaptors/mod.rs
@@ -612,7 +612,7 @@ where
 /// See [`.tuple_combinations()`](crate::Itertools::tuple_combinations) for more
 /// information.
 #[derive(Clone, Debug)]
-#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
+#[must_use = "this iterator adaptor is not lazy but does nearly nothing unless consumed"]
 pub struct TupleCombinations<I, T>
 where
     I: Iterator,
diff --git a/src/kmerge_impl.rs b/src/kmerge_impl.rs
index 4660caf07..0be3840a1 100644
--- a/src/kmerge_impl.rs
+++ b/src/kmerge_impl.rs
@@ -153,7 +153,7 @@ where
 ///
 /// See [`.kmerge_by()`](crate::Itertools::kmerge_by) for more
 /// information.
-#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
+#[must_use = "this iterator adaptor is not lazy but does nearly nothing unless consumed"]
 pub struct KMergeBy<I, F>
 where
     I: Iterator,
diff --git a/tests/laziness.rs b/tests/laziness.rs
index f936decde..c559d33ad 100644
--- a/tests/laziness.rs
+++ b/tests/laziness.rs
@@ -143,11 +143,11 @@ must_use_tests! {
         let _ = Panicking.merge_join_by(Panicking, |_, _| true);
         let _ = Panicking.merge_join_by(Panicking, Ord::cmp);
     }
-    #[ignore]
+    #[should_panic]
     kmerge {
         let _ = Panicking.map(|_| Panicking).kmerge();
     }
-    #[ignore]
+    #[should_panic]
     kmerge_by {
         let _ = Panicking.map(|_| Panicking).kmerge_by(|_, _| true);
     }
@@ -196,10 +196,15 @@ must_use_tests! {
     while_some {
         let _ = Panicking.map(Some).while_some();
     }
-    #[ignore]
-    tuple_combinations {
+    tuple_combinations1 {
         let _ = Panicking.tuple_combinations::<(_,)>();
+    }
+    #[should_panic]
+    tuple_combinations2 {
         let _ = Panicking.tuple_combinations::<(_, _)>();
+    }
+    #[should_panic]
+    tuple_combinations3 {
         let _ = Panicking.tuple_combinations::<(_, _, _)>();
     }
     combinations {