diff --git a/README.md b/README.md
index 434cf29..e8504aa 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ To convert the tests to JUnit XML:
 import junit_xml
 
 with open("test_results.xml", "w") as out_file:
-    junit_xml.TestSuite.to_file(out_file, [results.to_junit()])
+    junit_xml.to_xml_report_file(out_file, [results.to_junit()])
 ```
 
 ### Test Results Format
diff --git a/tests/test_junit.py b/tests/test_junit.py
index 2a6d706..0245089 100644
--- a/tests/test_junit.py
+++ b/tests/test_junit.py
@@ -23,7 +23,7 @@ def test_junit_from_unity_normal(self):
             results = unity_test_parser.TestResults(output_file.read(), unity_test_parser.UNITY_BASIC)
         
         out_string = io.StringIO()
-        junit_xml.TestSuite.to_file(out_string, [results.to_junit()])
+        junit_xml.to_xml_report_file(out_string, [results.to_junit()])
         verify(out_string.getvalue(), self.reporter)
 
     def test_junit_from_unity_fixture(self):
@@ -32,5 +32,5 @@ def test_junit_from_unity_fixture(self):
             results = unity_test_parser.TestResults(output_file.read(), unity_test_parser.UNITY_FIXTURE_VERBOSE)
         
         out_string = io.StringIO()
-        junit_xml.TestSuite.to_file(out_string, [results.to_junit()])
+        junit_xml.to_xml_report_file(out_string, [results.to_junit()])
         verify(out_string.getvalue(), self.reporter)