diff --git a/projects/pytest-py/Dockerfile b/projects/pytest-py/Dockerfile
new file mode 100644
index 000000000..560598de9
--- /dev/null
+++ b/projects/pytest-py/Dockerfile
@@ -0,0 +1,18 @@
+#!/usr/bin/python3
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN git clone https://github.com/pytest-dev/py py
+COPY *.sh *py $SRC/
+WORKDIR $SRC/py
diff --git a/projects/pytest-py/build.sh b/projects/pytest-py/build.sh
new file mode 100644
index 000000000..5e7570e43
--- /dev/null
+++ b/projects/pytest-py/build.sh
@@ -0,0 +1,22 @@
+#!/bin/bash -eu
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+python3 setup.py develop
+
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer --hidden-import=py._builtin
+done
diff --git a/projects/pytest-py/fuzz_source.py b/projects/pytest-py/fuzz_source.py
new file mode 100644
index 000000000..65db99f77
--- /dev/null
+++ b/projects/pytest-py/fuzz_source.py
@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import sys
+import atheris
+
+import py
+from py._code.source import Source
+
+
+def TestOneInput(data):
+  if len(data) < 3:
+    return
+  fdp = atheris.FuzzedDataProvider(data)
+
+  source = Source(fdp.ConsumeUnicodeNoSurrogates(sys.maxsize))
+  source.isparseable()
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()
diff --git a/projects/pytest-py/project.yaml b/projects/pytest-py/project.yaml
new file mode 100644
index 000000000..10f772c0c
--- /dev/null
+++ b/projects/pytest-py/project.yaml
@@ -0,0 +1,10 @@
+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/pytest-dev/py
+language: python
+main_repo: https://github.com/pytest-dev/py
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com