diff --git a/lint-requirements.txt b/lint-requirements.txt
index a4d2f0a3c..0b8dc8bff 100644
--- a/lint-requirements.txt
+++ b/lint-requirements.txt
@@ -1,3 +1,3 @@
-flake8-bugbear
+flake8-bugbear < 23.6
 black ~= 23.3
 codespell
diff --git a/mypy-requirements.txt b/mypy-requirements.txt
index 2820ce859..51972f3fd 100644
--- a/mypy-requirements.txt
+++ b/mypy-requirements.txt
@@ -1,5 +1,5 @@
 mypy==1.2.0  # also update pyproject.toml
-ruamel.yaml>=0.16.0,<0.17.22
+ruamel.yaml>=0.16.0,<0.17.27
 schema-salad>=8.4,<9
 cwl-utils >=0.22
 types-requests
diff --git a/pyproject.toml b/pyproject.toml
index 7535f5926..12f4a145a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ requires = [
     "types-pkg_resources",
     "types-requests",
     "types-psutil",
-    "ruamel.yaml>=0.16.0,<0.17.22",
+    "ruamel.yaml>=0.16.0,<0.17.27",
     "schema-salad>=8.2.20211104054942,<9",
     "cwl-utils >=0.19",
     'toml',
diff --git a/requirements.txt b/requirements.txt
index 1758dab6e..c9afa7688 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 requests>=2.6.1
-ruamel.yaml>=0.16.0,<0.17.22;python_version>='3.10'
-ruamel.yaml>=0.15,<0.17.22
+ruamel.yaml>=0.16.0,<0.17.27;python_version>='3.10'
+ruamel.yaml>=0.15,<0.17.27
 rdflib>=4.2.2,<6.4
 rdflib>= 4.2.2, < 6.0.0;python_version<='3.6'
 shellescape>=3.4.1,<3.9
diff --git a/setup.py b/setup.py
index 6f1449e40..d9062ceff 100644
--- a/setup.py
+++ b/setup.py
@@ -107,7 +107,7 @@
         "setuptools",
         "requests >= 2.6.1",  # >= 2.6.1 to workaround
         # https://github.com/ionrock/cachecontrol/issues/137
-        "ruamel.yaml >= 0.15, < 0.17.22",
+        "ruamel.yaml >= 0.15, < 0.17.27",
         "rdflib >= 4.2.2, < 6.4.0",
         "rdflib >= 4.2.2, < 6.0.0;python_version<='3.6'",
         "shellescape >= 3.4.1, < 3.9",
diff --git a/tests/test_examples.py b/tests/test_examples.py
index e39a079a3..3e07f9c69 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -816,8 +816,7 @@ def test_lifting() -> None:
     # fails if the step 'out' doesn't match.
     factory = cwltool.factory.Factory()
     with pytest.raises(ValidationException):
-        echo = factory.make(get_data("tests/test_bad_outputs_wf.cwl"))
-        assert echo(inp="foo") == {"out": "foo\n"}
+        factory.make(get_data("tests/test_bad_outputs_wf.cwl"))
 
 
 def test_malformed_outputs() -> None:
diff --git a/tests/test_mpi.py b/tests/test_mpi.py
index 7322f9e30..3eb011972 100644
--- a/tests/test_mpi.py
+++ b/tests/test_mpi.py
@@ -347,15 +347,15 @@ def test_docker_required(schema_ext11: Names) -> None:
 
 def test_docker_mpi_both_required(schema_ext11: Names) -> None:
     # Both required - error
+    lc, rc, tool = mk_tool(schema_ext11, [], reqs=[mpiReq, containerReq])
+    clt = CommandLineTool(tool, lc)
     with pytest.raises(cwltool.errors.UnsupportedRequirement):
-        lc, rc, tool = mk_tool(schema_ext11, [], reqs=[mpiReq, containerReq])
-        clt = CommandLineTool(tool, lc)
         clt.make_job_runner(rc)
 
 
 def test_docker_mpi_both_hinted(schema_ext11: Names) -> None:
     # Both hinted - error
+    lc, rc, tool = mk_tool(schema_ext11, [], hints=[mpiReq, containerReq])
+    clt = CommandLineTool(tool, lc)
     with pytest.raises(cwltool.errors.UnsupportedRequirement):
-        lc, rc, tool = mk_tool(schema_ext11, [], hints=[mpiReq, containerReq])
-        clt = CommandLineTool(tool, lc)
         clt.make_job_runner(rc)