diff --git a/taskcluster/test/test_transforms_firefoxci_artifact.py b/taskcluster/test/test_transforms_firefoxci_artifact.py
new file mode 100644
index 00000000..dede2d56
--- /dev/null
+++ b/taskcluster/test/test_transforms_firefoxci_artifact.py
@@ -0,0 +1,190 @@
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at http://mozilla.org/MPL/2.0/.
+
+from pprint import pprint
+from typing import Any
+
+import pytest
+from taskgraph.util.copy import deepcopy
+from taskgraph.util.templates import merge
+
+from fxci_config_taskgraph.transforms.firefoxci_artifact import transforms
+from fxci_config_taskgraph.util.integration import (
+    FIREFOXCI_ROOT_URL,
+    STAGING_ROOT_URL,
+    find_tasks,
+)
+
+
+@pytest.fixture
+def run_test(monkeypatch, run_transform, responses):
+    """This fixture returns a function that will execute the test.
+
+    Input to the function is a JSON object representing extra task config of a
+    single task that will be found on the index.
+
+    The fixture will return the result of running the `integration_test`
+    transforms on this task.
+    """
+    index = "foo.bar.baz"
+    decision_task_id = "abc"
+    monkeypatch.setenv("TASKCLUSTER_ROOT_URL", STAGING_ROOT_URL)
+    monkeypatch.setenv("TASK_ID", decision_task_id)
+
+    task_label = "foo"
+    base_task = {
+        "attributes": {},
+        "task": {
+            "dependencies": [],
+            "extra": {},
+            "metadata": {"name": task_label, "description": "test"},
+            "payload": {"command": "", "worker": {}},
+            "tags": {},
+        },
+    }
+
+    responses.add(
+        responses.GET,
+        f"{FIREFOXCI_ROOT_URL}/api/index/v1/task/{index}",
+        json={"taskId": decision_task_id},
+    )
+
+    def inner(task: dict[str, Any]) -> dict[str, Any] | None:
+        find_tasks.cache_clear()
+
+        task = merge(deepcopy(base_task), task)
+        task_graph = {task_label: task}
+
+        responses.upsert(
+            responses.GET,
+            f"{FIREFOXCI_ROOT_URL}/api/queue/v1/task/{decision_task_id}/artifacts/public%2Ftask-graph.json",
+            json=task_graph,
+        )
+
+        transform_task = {
+            "name": "gecko",
+            "decision-index-paths": [index],
+            "worker": {
+                "env": {
+                    "MOZ_ARTIFACT_DIR": "/builds/worker/artifacts",
+                }
+            },
+        }
+        result = run_transform(transforms, transform_task)
+        print("Dumping for copy/paste:")
+        pprint(result, indent=2)
+        return result
+
+    return inner
+
+
+def test_no_dependencies(run_test):
+    result = run_test({"attributes": {"unittest_variant": "os-integration"}})
+    assert result == []
+
+
+def test_docker_image_no_task_id(run_test):
+    result = run_test(
+        {
+            "attributes": {"unittest_variant": "os-integration"},
+            "task": {"payload": {"image": "foo/bar"}},
+        }
+    )
+    assert result == []
+
+
+def test_public_fetch(run_test):
+    result = run_test(
+        {
+            "attributes": {"unittest_variant": "os-integration"},
+            "task": {
+                "payload": {
+                    "env": {
+                        "MOZ_FETCHES": '[{"task": "def", "artifact": "public/foo.txt"}]'
+                    },
+                },
+            },
+        }
+    )
+    assert result == []
+
+
+def test_private_fetch_no_attribute(run_test):
+    result = run_test(
+        {
+            "task": {
+                "payload": {
+                    "env": {
+                        "MOZ_FETCHES": '[{"task": "def", "artifact": "private/foo.txt"}]'
+                    },
+                },
+            },
+        }
+    )
+    assert result == []
+
+
+def assert_result(task_id, artifact, result):
+    assert result == [
+        {
+            "cache": {
+                "digest-data": [],
+                "name": f"gecko-{task_id}",
+                "type": "firefoxci-artifact.v1",
+            },
+            "label": f"firefoxci-artifact-gecko-{task_id}",
+            "name": "gecko",
+            "worker": {
+                "artifacts": [
+                    {
+                        "name": artifact,
+                        "path": f"/builds/worker/artifacts/{artifact.rsplit('/', 1)[-1]}",
+                        "type": "file",
+                    }
+                ],
+                "env": {
+                    "FETCH_FIREFOXCI_ARTIFACTS": f'["{artifact}"]',
+                    "FETCH_FIREFOXCI_TASK_ID": task_id,
+                    "MOZ_ARTIFACT_DIR": "/builds/worker/artifacts",
+                },
+            },
+        }
+    ]
+
+
+def test_private_fetch(run_test):
+    task_id = "def"
+    artifact = "private/foo.txt"
+    result = run_test(
+        {
+            "attributes": {"unittest_variant": "os-integration"},
+            "task": {
+                "payload": {
+                    "env": {
+                        "MOZ_FETCHES": f'[{{"task": "{task_id}", "artifact": "{artifact}"}}]'
+                    },
+                },
+            },
+        }
+    )
+    assert_result(task_id, artifact, result)
+
+
+def test_docker_image_task_id(run_test):
+    task_id = "def"
+    artifact = "public/image.tar.zst"
+    result = run_test(
+        {
+            "attributes": {"unittest_variant": "os-integration"},
+            "task": {
+                "payload": {
+                    "image": {
+                        "taskId": task_id,
+                        "path": artifact,
+                    }
+                }
+            },
+        }
+    )
+    assert_result(task_id, artifact, result)