diff --git a/libs/elasticsearch-core/src/test/java/org/elasticsearch/core/internal/io/IOUtilsTests.java b/libs/elasticsearch-core/src/test/java/org/elasticsearch/core/internal/io/IOUtilsTests.java
index c133a9ddc1f3c..ee5af323b5219 100644
--- a/libs/elasticsearch-core/src/test/java/org/elasticsearch/core/internal/io/IOUtilsTests.java
+++ b/libs/elasticsearch-core/src/test/java/org/elasticsearch/core/internal/io/IOUtilsTests.java
@@ -53,7 +53,7 @@ public void testCloseArray() throws IOException {
     }
 
     public void testCloseIterable() throws IOException {
-        runTestClose(Arrays::asList, IOUtils::close);
+        runTestClose((Function<Closeable[], List<Closeable>>) Arrays::asList, IOUtils::close);
     }
 
     private <T> void runTestClose(final Function<Closeable[], T> function, final CheckedConsumer<T, IOException> close) throws IOException {
@@ -74,7 +74,7 @@ public void testCloseArrayWithIOExceptions() throws IOException {
     }
 
     public void testCloseIterableWithIOExceptions() throws IOException {
-        runTestCloseWithIOExceptions(Arrays::asList, IOUtils::close);
+        runTestCloseWithIOExceptions((Function<Closeable[], List<Closeable>>) Arrays::asList, IOUtils::close);
     }
 
     private <T> void runTestCloseWithIOExceptions(
@@ -113,7 +113,7 @@ public void testDeleteFilesIgnoringExceptionsArray() throws IOException {
     }
 
     public void testDeleteFilesIgnoringExceptionsIterable() throws IOException {
-        runDeleteFilesIgnoringExceptionsTest(Arrays::asList, IOUtils::deleteFilesIgnoringExceptions);
+        runDeleteFilesIgnoringExceptionsTest((Function<Path[], List<Path>>) Arrays::asList, IOUtils::deleteFilesIgnoringExceptions);
     }
 
     private <T> void runDeleteFilesIgnoringExceptionsTest(