diff --git a/src/func/test_suite.rs b/src/func/test_suite.rs
index cfaa8ee..d664f69 100644
--- a/src/func/test_suite.rs
+++ b/src/func/test_suite.rs
@@ -1,6 +1,6 @@
 use super::{tests::*, *};
 
-pub trait FunctorTestSuite: WeakFunctor + Eqr + 'static {
+pub trait FunctorTestSuite: WeakFunctor + Eqr {
     fn sample<'a, A: 'a, F: FnMut(&'a dyn Fn(A) -> Self::F<'a, A>)>(f: F)
     where
         Self::F<'a, A>: 'a;
diff --git a/src/func/tests.rs b/src/func/tests.rs
index 4c199e6..dd0e1ea 100644
--- a/src/func/tests.rs
+++ b/src/func/tests.rs
@@ -243,8 +243,8 @@ pub fn discard_can_be_expressed_via_seq_or_la2<
     T: Applicative + Eqr,
     A: 'a,
     B: 'a + Debug + PartialEq,
-    FA0: Fn() -> T::F<'a, A>,
-    FB0: Fn() -> T::F<'a, B>,
+    FA0: 'a + Fn() -> T::F<'a, A>,
+    FB0: 'a + Fn() -> T::F<'a, B>,
 >(
     fa0: FA0,
     fb0: FB0,
@@ -301,7 +301,7 @@ pub fn bind_is_associative<
     C: 'a + Debug + PartialEq,
     F: 'a + Clone + Fn(B) -> T::F<'a, C>,
     G: 'a + Clone + Fn(A) -> T::F<'a, B>,
-    FA0: Fn() -> T::F<'a, A>,
+    FA0: 'a + Fn() -> T::F<'a, A>,
 >(
     f: F,
     g: G,