diff --git a/src/test/java/org/cactoos/func/AndTest.java b/src/test/java/org/cactoos/func/AndTest.java
index 42bbea2f6b..87d9e6a2bb 100644
--- a/src/test/java/org/cactoos/func/AndTest.java
+++ b/src/test/java/org/cactoos/func/AndTest.java
@@ -97,7 +97,7 @@ public void iteratesList() {
         MatcherAssert.assertThat(
             "Can't iterate a list with a procedure",
             new And(
-                new MappedIterable<>(
+                new MappedIterable<String, Scalar<Boolean>>(
                     new ArrayAsIterable<>("hello", "world"),
                     new FuncOf<>(list::add, () -> true)
                 )