diff --git a/httprunner/cli.py b/httprunner/cli.py
index 0c164b66..d215bc87 100644
--- a/httprunner/cli.py
+++ b/httprunner/cli.py
@@ -24,7 +24,6 @@ from httprunner.v3.api import HttpRunner
 from httprunner.ext.har2case import init_har2case_parser, main_har2case
 from httprunner.ext.scaffold import init_parser_scaffold, main_scaffold
 from httprunner.ext.locusts import init_parser_locusts, main_locusts
-from httprunner.report import gen_html_report
 
 
 def init_parser_run(subparsers):
@@ -75,8 +74,7 @@ def main_run(args):
         for path in args.testfile_paths:
             testsuite_summary = runner.run_path(path, dot_env_path=args.dot_env_path)
             report_dir = args.report_dir or os.path.join(os.getcwd(), "reports")
-            gen_html_report(
-                testsuite_summary,
+            runner.gen_html_report(
                 report_template=args.report_template,
                 report_dir=report_dir,
                 report_file=args.report_file
diff --git a/httprunner/v3/api.py b/httprunner/v3/api.py
index bbce1a64..06c4ce61 100644
--- a/httprunner/v3/api.py
+++ b/httprunner/v3/api.py
@@ -6,6 +6,7 @@ from typing import List, Dict
 from loguru import logger
 
 from httprunner import report, loader, utils, exceptions, __version__
+from httprunner.report import gen_html_report
 from httprunner.v3.runner import TestCaseRunner
 from httprunner.v3.schema import TestsMapping, TestCaseSummary, TestSuiteSummary
 
@@ -279,3 +280,9 @@ class HttpRunner(object):
             return self.run_tests(path_or_tests)
         else:
             raise exceptions.ParamsError(f"Invalid testcase path or testcases: {path_or_tests}")
+
+    def gen_html_report(self, report_template=None, report_dir=None, report_file=None):
+        if not self._summary:
+            return None
+
+        return gen_html_report(self._summary, report_template, report_dir, report_file)