diff --git a/.github/workflows/examples.yml b/.github/workflows/examples.yml
index 078adb68..59e5bf56 100644
--- a/.github/workflows/examples.yml
+++ b/.github/workflows/examples.yml
@@ -29,6 +29,9 @@ on:
 permissions:
   contents: read # to fetch code (actions/checkout)
 
+env:
+  PYTEST_CELERY_PKG: "pytest-celery@git+https://github.com/${{ github.event.pull_request.head.repo.full_name || github.repository }}.git@${{ github.event.pull_request.head.sha || github.sha }}"
+
 jobs:
   celery_bug_report:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 3562ab6b..a1becb89 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -29,6 +29,9 @@ on:
 permissions:
   contents: read # to fetch code (actions/checkout)
 
+env:
+  PYTEST_CELERY_PKG: "pytest-celery@git+https://github.com/${{ github.event.pull_request.head.repo.full_name || github.repository }}.git@${{ github.event.pull_request.head.sha || github.sha }}"
+
 jobs:
   Unit:
     runs-on: ${{ matrix.os }}
diff --git a/src/pytest_celery/__init__.py b/src/pytest_celery/__init__.py
index b482c512..7a765566 100644
--- a/src/pytest_celery/__init__.py
+++ b/src/pytest_celery/__init__.py
@@ -115,6 +115,7 @@
     from pytest_celery.vendors.worker.fixtures import default_worker_env
     from pytest_celery.vendors.worker.fixtures import default_worker_initial_content
     from pytest_celery.vendors.worker.fixtures import default_worker_ports
+    from pytest_celery.vendors.worker.fixtures import default_worker_pytest_celery_pkg
     from pytest_celery.vendors.worker.fixtures import default_worker_signals
     from pytest_celery.vendors.worker.fixtures import default_worker_tasks
     from pytest_celery.vendors.worker.fixtures import default_worker_utils_module
diff --git a/src/pytest_celery/vendors/worker/Dockerfile b/src/pytest_celery/vendors/worker/Dockerfile
index 03a95ef7..0346b3c2 100644
--- a/src/pytest_celery/vendors/worker/Dockerfile
+++ b/src/pytest_celery/vendors/worker/Dockerfile
@@ -26,6 +26,7 @@ ARG CELERY_VERSION=""
 ARG CELERY_LOG_LEVEL=INFO
 ARG CELERY_WORKER_NAME=celery_test_worker
 ARG CELERY_WORKER_QUEUE=celery
+ARG PYTEST_CELERY_PKG="pytest-celery"
 ENV WORKER_VERSION=$CELERY_VERSION
 ENV LOG_LEVEL=$CELERY_LOG_LEVEL
 ENV WORKER_NAME=$CELERY_WORKER_NAME
@@ -40,7 +41,7 @@ EXPOSE 5678
 RUN pip install --no-cache-dir --upgrade \
     pip \
     celery[redis,pymemcache,gevent,sqs]${WORKER_VERSION:+==$WORKER_VERSION} \
-    pytest-celery
+    "${PYTEST_CELERY_PKG}"
 
 # The workdir must be /app
 WORKDIR /app
diff --git a/src/pytest_celery/vendors/worker/container.py b/src/pytest_celery/vendors/worker/container.py
index 61a96359..9c37e2f4 100644
--- a/src/pytest_celery/vendors/worker/container.py
+++ b/src/pytest_celery/vendors/worker/container.py
@@ -15,6 +15,7 @@
 from pytest_celery.vendors.worker.defaults import DEFAULT_WORKER_LOG_LEVEL
 from pytest_celery.vendors.worker.defaults import DEFAULT_WORKER_NAME
 from pytest_celery.vendors.worker.defaults import DEFAULT_WORKER_PORTS
+from pytest_celery.vendors.worker.defaults import DEFAULT_WORKER_PYTEST_CELERY_PKG
 from pytest_celery.vendors.worker.defaults import DEFAULT_WORKER_QUEUE
 from pytest_celery.vendors.worker.defaults import DEFAULT_WORKER_VERSION
 from pytest_celery.vendors.worker.volume import WorkerInitialContent
@@ -140,6 +141,15 @@ def signals_modules(cls) -> set:
         """
         return set()
 
+    @classmethod
+    def pytest_celery_pkg(cls) -> str:
+        """The pytest-celery package to install in the worker container.
+
+        Returns:
+            str: pip install spec for pytest-celery.
+        """
+        return DEFAULT_WORKER_PYTEST_CELERY_PKG
+
     @classmethod
     def buildargs(cls) -> dict:
         """Build arguments for the built-in worker image."""
@@ -148,6 +158,7 @@ def buildargs(cls) -> dict:
             "CELERY_LOG_LEVEL": cls.log_level(),
             "CELERY_WORKER_NAME": cls.worker_name(),
             "CELERY_WORKER_QUEUE": cls.worker_queue(),
+            "PYTEST_CELERY_PKG": cls.pytest_celery_pkg(),
         }
 
     @classmethod
diff --git a/src/pytest_celery/vendors/worker/defaults.py b/src/pytest_celery/vendors/worker/defaults.py
index 087e19c3..e1165863 100644
--- a/src/pytest_celery/vendors/worker/defaults.py
+++ b/src/pytest_celery/vendors/worker/defaults.py
@@ -37,3 +37,4 @@
 DEFAULT_WORKER_QUEUE = WORKER_QUEUE
 DEFAULT_WORKER_CONTAINER_TIMEOUT = 60
 DEFAULT_WORKER_VOLUME = WORKER_VOLUME
+DEFAULT_WORKER_PYTEST_CELERY_PKG = os.environ.get("PYTEST_CELERY_PKG", "pytest-celery")
diff --git a/src/pytest_celery/vendors/worker/fixtures.py b/src/pytest_celery/vendors/worker/fixtures.py
index acdb6d78..4c8dcdf9 100644
--- a/src/pytest_celery/vendors/worker/fixtures.py
+++ b/src/pytest_celery/vendors/worker/fixtures.py
@@ -103,6 +103,7 @@ def default_worker_container_session_cls() -> type[CeleryWorkerContainer]:
         "CELERY_LOG_LEVEL": fxtr("default_worker_celery_log_level"),
         "CELERY_WORKER_NAME": fxtr("default_worker_celery_worker_name"),
         "CELERY_WORKER_QUEUE": fxtr("default_worker_celery_worker_queue"),
+        "PYTEST_CELERY_PKG": fxtr("default_worker_pytest_celery_pkg"),
     },
 )
 
@@ -163,6 +164,19 @@ def default_worker_celery_worker_queue(default_worker_container_session_cls: typ
     return default_worker_container_session_cls.worker_queue()
 
 
+@pytest.fixture(scope="session")
+def default_worker_pytest_celery_pkg(default_worker_container_session_cls: type[CeleryWorkerContainer]) -> str:
+    """The pytest-celery package to install in the worker container.
+
+    Args:
+        default_worker_container_session_cls (type[CeleryWorkerContainer]): See also: :ref:`vendor-class`.
+
+    Returns:
+        str: pip install spec for pytest-celery.
+    """
+    return default_worker_container_session_cls.pytest_celery_pkg()
+
+
 @pytest.fixture
 def default_worker_command(default_worker_container_cls: type[CeleryWorkerContainer]) -> list[str]:
     """Command to run the container.
diff --git a/tests/unit/vendors/test_worker/test_worker.py b/tests/unit/vendors/test_worker/test_worker.py
index 8bb34a57..2182f214 100644
--- a/tests/unit/vendors/test_worker/test_worker.py
+++ b/tests/unit/vendors/test_worker/test_worker.py
@@ -7,6 +7,7 @@
 from pytest_celery import DEFAULT_WORKER_ENV
 from pytest_celery import DEFAULT_WORKER_LOG_LEVEL
 from pytest_celery import DEFAULT_WORKER_NAME
+from pytest_celery import DEFAULT_WORKER_PYTEST_CELERY_PKG
 from pytest_celery import DEFAULT_WORKER_QUEUE
 from pytest_celery import DEFAULT_WORKER_VERSION
 from pytest_celery import CeleryBackendCluster
@@ -46,6 +47,7 @@ def test_buildargs(self):
             "CELERY_LOG_LEVEL": DEFAULT_WORKER_LOG_LEVEL,
             "CELERY_WORKER_NAME": DEFAULT_WORKER_NAME,
             "CELERY_WORKER_QUEUE": DEFAULT_WORKER_QUEUE,
+            "PYTEST_CELERY_PKG": DEFAULT_WORKER_PYTEST_CELERY_PKG,
         }
 
     class test_celery_worker_container_env: