diff --git a/taskcluster/gecko_taskgraph/target_tasks.py b/taskcluster/gecko_taskgraph/target_tasks.py
index eac2a50e4013..0dc014ec7ca5 100644
--- a/taskcluster/gecko_taskgraph/target_tasks.py
+++ b/taskcluster/gecko_taskgraph/target_tasks.py
@@ -308,6 +308,9 @@ def _try_task_config(full_task_graph, parameters, graph_config):
             ]
         )
 
+        if "MOZHARNESS_TEST_PATHS" in parameters["try_task_config"].get("env", {}):
+            matched_tasks = [x for x in matched_tasks if x.endswith("-1")]
+
     return list(set(tasks) | set(matched_tasks))
 
 
diff --git a/taskcluster/gecko_taskgraph/test/test_target_tasks.py b/taskcluster/gecko_taskgraph/test/test_target_tasks.py
index 2bbc57fcf356..22582f904042 100644
--- a/taskcluster/gecko_taskgraph/test/test_target_tasks.py
+++ b/taskcluster/gecko_taskgraph/test/test_target_tasks.py
@@ -210,6 +210,21 @@ class TestTargetTasks(unittest.TestCase):
         }
         self.assertEqual(sorted(method(tg, params, {})), ["ddd-1", "ddd-2"])
 
+    def test_try_task_config_regex_with_paths(self):
+        "try_mode = try_task_config uses the try config with regex instead of chunk numbers"
+        tg = self.make_task_graph()
+        method = target_tasks.get_method("try_tasks")
+        params = {
+            "try_mode": "try_task_config",
+            "try_task_config": {
+                "new-test-config": True,
+                "tasks": ["ddd-*"],
+                "env": {"MOZHARNESS_TEST_PATHS": "foo/bar"},
+            },
+            "project": "try",
+        }
+        self.assertEqual(sorted(method(tg, params, {})), ["ddd-1"])
+
     def test_try_task_config_absolute(self):
         "try_mode = try_task_config uses the try config with full task labels"
         tg = self.make_task_graph()