diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 635a5eb..4721c09 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         os: [ubuntu-latest, windows-latest]
 
     steps:
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index c0f5243..b2daf32 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,8 +1,9 @@
 UNRELEASED
 ----------
 
-* Added official support for Python 3.12 and 3.13.
-* Dropped support for EOL Python 3.7 and Python 3.8.
+* `#90 <https://github.com/pytest-dev/pytest-reportlog/issues/90>`_: Fix jsonl output for pytest subtests (introduced in pytest 9.0).
+* Added official support for Python 3.12, 3.13, and 3.14.
+* Dropped support for EOL Python 3.7, 3.8, and 3.9.
 
 0.4.0 (2023-05-22)
 ------------------
diff --git a/pyproject.toml b/pyproject.toml
index b1e5005..07d5b73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ dynamic = ["version"]
 description = "Replacement for the --resultlog option, focused in simplicity and extensibility"
 readme = "README.rst"
 license = "MIT"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 authors = [
     { name = "Bruno Oliveira", email = "bruno@pytest.org" },
 ]
@@ -30,11 +30,11 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.13",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Testing",
 ]
 dependencies = [
diff --git a/src/pytest_reportlog/plugin.py b/src/pytest_reportlog/plugin.py
index 8c2a672..d44d56f 100644
--- a/src/pytest_reportlog/plugin.py
+++ b/src/pytest_reportlog/plugin.py
@@ -89,6 +89,11 @@ def pytest_runtest_logreport(self, report):
         data = self._config.hook.pytest_report_to_serializable(
             config=self._config, report=report
         )
+
+        # Workaround for subtests that output `_report_type` instead of `$report_type` (#90).
+        if "_report_type" in data:
+            data["$report_type"] = data.pop("_report_type")
+
         if (
             self._config.option.report_log_exclude_logs_on_passed_tests
             and data.get("outcome", "") == "passed"
diff --git a/tests/test_reportlog.py b/tests/test_reportlog.py
index 2586c69..0fcde91 100644
--- a/tests/test_reportlog.py
+++ b/tests/test_reportlog.py
@@ -186,3 +186,21 @@ def __str__(self):
     bad = {"x": 1, "y": ["a", "b"], "c": C()}
     new = cleanup_unserializable(bad)
     assert new == {"x": 1, "c": "C instance", "y": ["a", "b"]}
+
+
+def test_subtest(pytester, tmp_path):
+    """Regression test for #90."""
+    pytester.makepyfile(
+        """
+        def test_foo(subtests):
+            with subtests.test():
+                pass
+    """
+    )
+    fn = tmp_path / "result.log"
+    result = pytester.runpytest(f"--report-log={fn}")
+    result.stdout.fnmatch_lines("*1 passed in*")
+    lines = fn.read_text("UTF-8").splitlines()
+    for line in lines:
+        data = json.loads(line)
+        assert "$report_type" in data