diff --git a/requirements.txt b/requirements.txt
index 025994df..2debf254 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,6 @@ networkx
 lsst-resources @ git+https://github.com/lsst/resources@main
 lsst-daf-butler @ git+https://github.com/lsst/daf_butler@main
 lsst-utils @ git+https://github.com/lsst/utils@main
-lsst-pipe-base @ git+https://github.com/lsst/pipe_base@tickets/DM-41711
+lsst-pipe-base @ git+https://github.com/lsst/pipe_base@tickets/DM-41605
 lsst-pex-config @ git+https://github.com/lsst/pex_config@main
 sqlalchemy
diff --git a/tests/test_cliCmdReport.py b/tests/test_cliCmdReport.py
index f16ddc09..4de7715b 100644
--- a/tests/test_cliCmdReport.py
+++ b/tests/test_cliCmdReport.py
@@ -32,6 +32,7 @@
 
 import yaml
 from lsst.ctrl.mpexec.cli.pipetask import cli as pipetask_cli
+from lsst.ctrl.mpexec.cli.script.report import print_summary
 from lsst.daf.butler.cli.utils import LogCliRunner, clickResultMsg
 from lsst.daf.butler.tests.utils import makeTestTempDir, removeTestTempDir
 from lsst.pipe.base.quantum_provenance_graph import DatasetTypeSummary, Summary, TaskSummary
@@ -487,6 +488,63 @@ def test_report(self):
                 },
             )
 
+    def test_aggregate_reports(self):
+        """Test `pipetask aggregate-reports` command. We make one
+        `SimpleQgraph` and then fake a copy in a couple of different ways,
+        making sure we can aggregate the similar graphs.
+        """
+        metadata = {"output_run": "run1"}
+        butler, qgraph1 = makeSimpleQGraph(
+            run="run",
+            root=self.root,
+            metadata=metadata,
+        )
+
+        # Check that we can get the proper run collection from the qgraph
+        self.assertEqual(check_output_run(qgraph1, "run"), [])
+
+        # Save the graph
+        graph_uri_1 = os.path.join(self.root, "graph1.qgraph")
+        qgraph1.saveUri(graph_uri_1)
+
+        file1 = os.path.join(self.root, "report_test_1.json")
+        file2 = os.path.join(self.root, "report_test_2.json")
+        aggregate_file = os.path.join(self.root, "aggregate_report.json")
+
+        report1 = self.runner.invoke(
+            pipetask_cli,
+            [
+                "report",
+                self.root,
+                graph_uri_1,
+                "--no-logs",
+                "--full-output-filename",
+                file1,
+                "--force-v2",
+            ],
+            input="no",
+        )
+
+        self.assertEqual(report1.exit_code, 0, clickResultMsg(report1))
+        # Now, copy the json output into a duplicate file and aggregate
+        with open(file1, "r") as f:
+            sum1 = Summary.model_validate_json(f.read())
+            sum2 = sum1.model_copy(deep=True)
+            print_summary(sum2, file2, brief=False)
+
+            # Then use these file outputs as the inputs to aggregate reports:
+            aggregate_report = self.runner.invoke(
+                pipetask_cli,
+                [
+                    "aggregate-reports",
+                    file1,
+                    file2,
+                    "--full-output-filename",
+                    aggregate_file,
+                ]
+            )
+            # Check that aggregate command had a zero exit code:
+            self.assertEqual(aggregate_report.exit_code, 0, clickResultMsg(aggregate_report))
 
 if __name__ == "__main__":
     unittest.main()