diff --git a/.github/workflows/ci-tests.yaml b/.github/workflows/ci-tests.yaml
index 55b10dbb6b..a1aebe82ac 100644
--- a/.github/workflows/ci-tests.yaml
+++ b/.github/workflows/ci-tests.yaml
@@ -184,12 +184,49 @@ jobs:
                   path: tests/testing-results
                   retention-days: 30
 
+    pyunit:
+        runs-on: [self-hosted, linux, x64]
+        if: github.event.pull_request.draft == false
+        container: ghcr.io/gem5/ubuntu-24.04_all-dependencies:latest
+        needs: [pre-commit, check-for-change-id, testlib-quick-gem5-builds]
+        timeout-minutes: 30
+        steps:
+
+            # Checkout the repository then download the builds.
+            - uses: actions/checkout@v4
+            - uses: actions/download-artifact@v4
+              with:
+                  name: ci-tests-${{ github.run_number }}-testlib-quick-all-gem5-builds
+
+            # Check that the gem5 binaries exist and are executable.
+            - name: Chmod gem5.{opt,debug,fast} to be executable
+              run: |
+                  find . -name "gem5.opt" -exec chmod u+x {} \;
+                  find . -name "gem5.debug" -exec chmod u+x {} \;
+                  find . -name "gem5.fast" -exec chmod u+x {} \;
+
+            # Run the pyunit tests.
+            # Note: these are all quick tests.
+            - name: Run The pyunit tests
+              id: run-tests
+              working-directory: ${{ github.workspace }}/tests
+              run: ./main.py run --skip-build -vv -j$(nproc) pyunit
+
+            # Upload the tests/testing-results directory as an artifact.
+            - name: Upload pyunit test results
+              if: success() || failure()
+              uses: actions/upload-artifact@v4
+              with:
+                  name: ci-tests-run-${{ github.run_number }}-attempt-${{ github.run_attempt }}-pyunit-status-${{ steps.run-tests.outcome }}-output
+                  path: tests/testing-results
+                  retention-days: 30
+
     testlib-quick:
     # It is 'testlib-quick' which needs to pass for the pull request to be
     # merged. The 'testlib-quick-execution' is a matrix job which runs all the
     # the testlib quick tests. This job is therefore a stub which will pass if
     # all the testlib-quick-execution jobs pass.
         runs-on: ubuntu-latest
-        needs: testlib-quick-execution
+        needs: [testlib-quick-execution, pyunit]
         steps:
             - run: echo "This job's status is ${{ job.status }}."
diff --git a/src/python/gem5/resources/resource.py b/src/python/gem5/resources/resource.py
index 591515a6b9..410dd3b018 100644
--- a/src/python/gem5/resources/resource.py
+++ b/src/python/gem5/resources/resource.py
@@ -481,27 +481,48 @@ class SimpointResource(AbstractResource):
         self._warmup_interval = warmup_interval
         self._workload_name = workload_name
 
+        self._simpoint_start_insts = None
+
+    def _load_simpoints(self) -> None:
+        """As we cache downloading of resources until we require it, we may
+        not pass the simpoint data in the constructor. In this case we enforce
+        that the simpoint data is loaded via ths `_load_simpoints` function.
+        Ergo when functions like `get_simpoint_list` are called, the data is
+        loaded.
+        """
         self._simpoint_start_insts = list(
-            inst * simpoint_interval for inst in self.get_simpoint_list()
+            inst * self.get_simpoint_interval()
+            for inst in self.get_simpoint_list()
         )
 
-        if self._warmup_interval != 0:
+        if self.get_warmup_interval() != 0:
             self._warmup_list = self._set_warmup_list()
         else:
             self._warmup_list = [0] * len(self.get_simpoint_start_insts)
 
     def get_simpoint_list(self) -> List[int]:
         """Returns the a list containing all the SimPoints for the workload."""
+        if self._simpoint_list is None:
+            self._load_simpoints()
+        assert self._simpoint_list is not None, "SimPoint list is None"
         return self._simpoint_list
 
     def get_simpoint_start_insts(self) -> List[int]:
         """Returns a lst containing all the SimPoint starting instrunction
         points for the workload. This was calculated by multiplying the
         SimPoint with the SimPoint interval when it was generated."""
+        if self._simpoint_start_insts is None:
+            self._load_simpoints()
+        assert (
+            self._simpoint_start_insts is not None
+        ), "SimPoint start insts is None"
         return self._simpoint_start_insts
 
     def get_warmup_interval(self) -> int:
         """Returns the instruction length of the warmup interval."""
+        if self._warmup_interval is None:
+            self._load_simpoints()
+        assert self._warmup_interval is not None, "Warmup interval is None"
         return self._warmup_interval
 
     def get_weight_list(self) -> List[float]:
@@ -509,6 +530,9 @@ class SimpointResource(AbstractResource):
         order of the weights matches that of the list returned by
         ``get_simpoint_list()``. I.e. ``get_weight_list()[3]`` is the weight for
         SimPoint ``get_simpoint_list()[3]``."""
+        if self._weight_list is None:
+            self._load_simpoints()
+        assert self._weight_list is not None, "Weight list is None"
         return self._weight_list
 
     def get_simpoint_interval(self) -> int:
@@ -520,6 +544,9 @@ class SimpointResource(AbstractResource):
         Each warmup length in this list corresponds to the SimPoint at the same
         index in ``get_simpoint_list()``. I.e., ``get_warmup_list()[4]`` is the
         warmup length for SimPoint ``get_simpoint_list()[4]``."""
+        if self._warmup_list is None:
+            self._load_simpoints()
+        assert self._warmup_list is not None, "Warmup list is None"
         return self._warmup_list
 
     def get_workload_name(self) -> Optional[str]:
@@ -644,20 +671,8 @@ class SimpointDirectoryResource(SimpointResource):
         self._simpoint_file = simpoint_file
         self._weight_file = weight_file
 
-        # This is a little hack. The functions `get_simpoint_file` and
-        # `get_weight_file` use the local path, so we set it here despite it
-        # also being set in the `AbstractResource` constructor. This isn't
-        # elegant but does not harm.
-        self._local_path = local_path
-        (
-            simpoint_list,
-            weight_list,
-        ) = self._get_weights_and_simpoints_from_file()
-
         super().__init__(
             simpoint_interval=simpoint_interval,
-            simpoint_list=simpoint_list,
-            weight_list=weight_list,
             warmup_interval=warmup_interval,
             workload_name=workload_name,
             local_path=local_path,
@@ -668,13 +683,22 @@ class SimpointDirectoryResource(SimpointResource):
             resource_version=resource_version,
         )
 
+    def _load_simpoints(self) -> None:
+        (
+            simpoint_list,
+            weight_list,
+        ) = self._get_weights_and_simpoints_from_file()
+        self._simpoint_list = simpoint_list
+        self._weight_list = weight_list
+        super()._load_simpoints()
+
     def get_simpoint_file(self) -> Path:
         """Return the SimPoint File path."""
-        return Path(Path(self._local_path) / self._simpoint_file)
+        return Path(Path(self.get_local_path()) / self._simpoint_file)
 
     def get_weight_file(self) -> Path:
         """Returns the Weight File path."""
-        return Path(Path(self._local_path) / self._weight_file)
+        return Path(Path(self.get_local_path()) / self._weight_file)
 
     def _get_weights_and_simpoints_from_file(
         self,
diff --git a/tests/pyunit/stdlib/resources/pyunit_client_wrapper_checks.py b/tests/pyunit/stdlib/resources/pyunit_client_wrapper_checks.py
index f98005e546..bfcab993a3 100644
--- a/tests/pyunit/stdlib/resources/pyunit_client_wrapper_checks.py
+++ b/tests/pyunit/stdlib/resources/pyunit_client_wrapper_checks.py
@@ -76,7 +76,7 @@ with open(Path(__file__).parent / "refs/mongo-dup-mock.json") as f:
     duplicate_mock_json = json.load(f)
 
 
-def mocked_requests_post(*args):
+def mocked_requests_post(*args, **kwargs):
     # mokcing urllib.request.urlopen
     class MockResponse:
         def __init__(self, json_data, status_code):
diff --git a/tests/pyunit/stdlib/resources/pyunit_suite_checks.py b/tests/pyunit/stdlib/resources/pyunit_suite_checks.py
index 79944a59fd..4f83294a47 100644
--- a/tests/pyunit/stdlib/resources/pyunit_suite_checks.py
+++ b/tests/pyunit/stdlib/resources/pyunit_suite_checks.py
@@ -35,6 +35,7 @@ from unittest.mock import patch
 
 from gem5.resources.client_api.client_wrapper import ClientWrapper
 from gem5.resources.resource import (
+    ShadowResource,
     SuiteResource,
     WorkloadResource,
     obtain_resource,
@@ -112,7 +113,7 @@ class SuiteResourceTestSuite(unittest.TestCase):
         self.assertIsInstance(filtered_suite, SuiteResource)
         self.assertEqual(len(filtered_suite), 1)
         for workload in filtered_suite:
-            self.assertIsInstance(workload, WorkloadResource)
+            self.assertIsInstance(workload, ShadowResource)
 
     @patch(
         "gem5.resources.client.clientwrapper",
@@ -124,7 +125,7 @@ class SuiteResourceTestSuite(unittest.TestCase):
         self.assertIsInstance(filtered_suite, SuiteResource)
         self.assertEqual(len(filtered_suite), 2)
         for workload in filtered_suite:
-            self.assertIsInstance(workload, WorkloadResource)
+            self.assertIsInstance(workload, ShadowResource)
 
     @patch(
         "gem5.resources.client.clientwrapper",
diff --git a/tests/pyunit/stdlib/resources/refs/suite-checks.json b/tests/pyunit/stdlib/resources/refs/suite-checks.json
index 7583020292..aa06835a93 100644
--- a/tests/pyunit/stdlib/resources/refs/suite-checks.json
+++ b/tests/pyunit/stdlib/resources/refs/suite-checks.json
@@ -23,8 +23,14 @@
         "description": "Description of workload here",
         "function": "set_kernel_disk_workload",
         "resources": {
-            "kernel": "x86-linux-kernel-5.2.3-example",
-            "disk-image": "x86-ubuntu-18.04-img-example"
+            "kernel": {
+                "id": "x86-linux-kernel-5.2.3-example",
+                "resource_version": "1.0.0"
+            },
+            "disk-image": {
+                "id": "x86-ubuntu-18.04-img-example",
+                "resource_version": "1.0.0"
+            }
         },
         "additional_params": {
             "readfile_contents": "echo 'Boot successful'; m5 exit"
@@ -40,8 +46,14 @@
         "description": "Description of workload here",
         "function": "set_kernel_disk_workload",
         "resources": {
-            "kernel": "x86-linux-kernel-5.2.3-example",
-            "disk-image": "x86-ubuntu-18.04-img-example"
+            "kernel": {
+                "id": "x86-linux-kernel-5.2.3-example",
+                "resource_version": "1.0.0"
+            },
+            "disk-image": {
+                "id": "x86-ubuntu-18.04-img-example",
+                "resource_version": "1.0.0"
+            }
         },
         "additional_params": {
             "readfile_contents": "echo 'Boot successful'; m5 exit"
diff --git a/tests/pyunit/stdlib/resources/refs/workload-checks.json b/tests/pyunit/stdlib/resources/refs/workload-checks.json
index bf954059c5..0daa52269b 100644
--- a/tests/pyunit/stdlib/resources/refs/workload-checks.json
+++ b/tests/pyunit/stdlib/resources/refs/workload-checks.json
@@ -34,8 +34,14 @@
         "description": "Description of workload here",
         "function": "set_kernel_disk_workload",
         "resources": {
-            "kernel": "x86-linux-kernel-5.2.3-example",
-            "disk-image": "x86-ubuntu-18.04-img-example"
+            "kernel": {
+                "id": "x86-linux-kernel-5.2.3-example",
+                "resource_version": "1.0.0"
+            },
+            "disk-image": {
+                "id": "x86-ubuntu-18.04-img-example",
+                "resource_version": "1.0.0"
+            }
         },
         "additional_params": {
             "readfile_contents": "echo 'Boot successful'; m5 exit"