diff --git a/unittests/function_redefinition.chai b/unittests/function_redefinition.chai
index 69ae19e6..f82a414c 100644
--- a/unittests/function_redefinition.chai
+++ b/unittests/function_redefinition.chai
@@ -1,2 +1,2 @@
-assert_throws("Function already defined", [](){ def foo(x) { x + 1 }; def foo(x) { x + 1 } } );
+assert_throws("Function already defined", fun(){ def foo(x) { x + 1 }; def foo(x) { x + 1 } } );
 
diff --git a/unittests/variable_redefinition.chai b/unittests/variable_redefinition.chai
index dc670e42..c59107c5 100644
--- a/unittests/variable_redefinition.chai
+++ b/unittests/variable_redefinition.chai
@@ -1,2 +1,2 @@
-assert_throws("Variable already defined", []() { auto y = 10; auto y = 20; })
+assert_throws("Variable already defined", fun() { auto y = 10; auto y = 20; })