diff --git a/pyproject.toml b/pyproject.toml
index c31cf3eb..c7df4fce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,4 +24,4 @@ exclude = '''
 '''
 
 [tool.ruff.lint]
-select = ["F401"]
+select = ["F401", "F541"]
diff --git a/src/tpm2_pytss/types.py b/src/tpm2_pytss/types.py
index b155e6de..cf1405a5 100644
--- a/src/tpm2_pytss/types.py
+++ b/src/tpm2_pytss/types.py
@@ -1840,7 +1840,7 @@ def to_tools(self, session_type: TPM2_SE = None, auth_hash: TPM2_ALG = None):
             session_type is None or auth_hash is None
         ):
             raise TypeError(
-                f"session_type and auth_hash most be defined for session contexts"
+                "session_type and auth_hash most be defined for session contexts"
             )
 
         version = 1
diff --git a/test/test_fapi.py b/test/test_fapi.py
index d8733a47..b1a10fbf 100644
--- a/test/test_fapi.py
+++ b/test/test_fapi.py
@@ -920,7 +920,7 @@ def test_policy_action(self):
                         }}
                     ]
                 }}
-                """
+                """  # noqa: F541 ruff is wrong here
         policy_path = f"/policy/policy_{random_uid()}"
         self.fapi.import_object(path=policy_path, import_data=policy)
 
diff --git a/test/test_types.py b/test/test_types.py
index 35d7a35e..279b2d9e 100644
--- a/test/test_types.py
+++ b/test/test_types.py
@@ -812,7 +812,7 @@ def test_TPMT_PUBLIC_parse_ecc_ecdaa4_sha256(self):
 
         # scheme is set, so we need to be smarter about the attributes we use
         templ = TPMT_PUBLIC.parse(
-            f"ecc:ecdaa4-sha256",
+            "ecc:ecdaa4-sha256",
             objectAttributes=TPMA_OBJECT.DEFAULT_TPM2_TOOLS_CREATEPRIMARY_ATTRS,
         )
         self.assertEqual(templ.nameAlg, TPM2_ALG.SHA256)
@@ -840,7 +840,7 @@ def test_TPMT_PUBLIC_parse_ecc_ecdaa4(self):
 
         # scheme is set, so we need to be smarter about the attributes we use
         templ = TPMT_PUBLIC.parse(
-            f"ecc:ecdaa4",
+            "ecc:ecdaa4",
             objectAttributes=TPMA_OBJECT.DEFAULT_TPM2_TOOLS_CREATEPRIMARY_ATTRS,
         )
         self.assertEqual(templ.nameAlg, TPM2_ALG.SHA256)