diff --git a/tests/decorators/test_branch_external_python.py b/tests/decorators/test_branch_external_python.py
index ca62e038f1ea5..745edafae86ce 100644
--- a/tests/decorators/test_branch_external_python.py
+++ b/tests/decorators/test_branch_external_python.py
@@ -27,7 +27,11 @@
 pytestmark = pytest.mark.db_test
 
 
-class Test_BranchPythonDecoratedOperator:
+class Test_BranchExternalPythonDecoratedOperator:
+    # when run in "Parallel" test run environment, sometimes this test runs for a long time
+    # because creating virtualenv and starting new Python interpreter creates a lot of IO/contention
+    # possibilities. So we are increasing the timeout for this test to 3x of the default timeout
+    @pytest.mark.execution_timeout(180)
     @pytest.mark.parametrize("branch_task_name", ["task_1", "task_2"])
     def test_branch_one(self, dag_maker, branch_task_name):
         @task
diff --git a/tests/decorators/test_branch_virtualenv.py b/tests/decorators/test_branch_virtualenv.py
index 66f539ca4c988..2b5f9bb95ed73 100644
--- a/tests/decorators/test_branch_virtualenv.py
+++ b/tests/decorators/test_branch_virtualenv.py
@@ -25,7 +25,11 @@
 pytestmark = pytest.mark.db_test
 
 
-class Test_BranchPythonDecoratedOperator:
+class Test_BranchPythonVirtualenvDecoratedOperator:
+    # when run in "Parallel" test run environment, sometimes this test runs for a long time
+    # because creating virtualenv and starting new Python interpreter creates a lot of IO/contention
+    # possibilities. So we are increasing the timeout for this test to 3x of the default timeout
+    @pytest.mark.execution_timeout(180)
     @pytest.mark.parametrize("branch_task_name", ["task_1", "task_2"])
     def test_branch_one(self, dag_maker, branch_task_name):
         @task