diff --git a/src/test/java/org/cactoos/func/ChainedFuncTest.java b/src/test/java/org/cactoos/func/ChainedFuncTest.java
index 8f1563fd28..985bc97bd8 100644
--- a/src/test/java/org/cactoos/func/ChainedFuncTest.java
+++ b/src/test/java/org/cactoos/func/ChainedFuncTest.java
@@ -50,7 +50,7 @@ public void withoutIterable() throws Exception {
                 new FilteredIterable<>(
                     new MappedIterable<>(
                         new ArrayAsIterable<>("public", "final", "class"),
-                        new ChainedFunc<>(
+                        new ChainedFunc<String, String, String>(
                             input -> input.concat("1"),
                             input -> input.concat("2")
                         )