diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 1e9a53acd..a0e3f4c85 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.260.0"
+  ".": "0.261.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 724183797..a7be6ee39 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 201
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-aacfe98109b9754d30676d3e95714223190bca5543e8060a90d7b946589f1c16.yml
-openapi_spec_hash: d6a090b406bd5936e2d939ce9b9e061b
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-fa06f0029b2f1cf3d611a6cb6c7fabdbf09dba80d0953e49dd4395bbd3bc3107.yml
+openapi_spec_hash: 724b6c1c0e7c9e28f35e9ad66e3fe54e
 config_hash: 97774f946585cecb19181a1817870d0b
diff --git a/CHANGELOG.md b/CHANGELOG.md
index daa2e5ad7..a4c4ea2ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.261.0 (2025-07-07)
+
+Full Changelog: [v0.260.0...v0.261.0](https://github.com/Increase/increase-python/compare/v0.260.0...v0.261.0)
+
+### Features
+
+* **api:** api update ([a0067fa](https://github.com/Increase/increase-python/commit/a0067fa471c5ad7c004ee1a3c5e9a1399d1224b3))
+
 ## 0.260.0 (2025-07-04)
 
 Full Changelog: [v0.259.0...v0.260.0](https://github.com/Increase/increase-python/compare/v0.259.0...v0.260.0)
diff --git a/pyproject.toml b/pyproject.toml
index 635beeca4..d08b431d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "increase"
-version = "0.260.0"
+version = "0.261.0"
 description = "The official Python library for the increase API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/increase/_version.py b/src/increase/_version.py
index e94d4215f..6e18e0898 100644
--- a/src/increase/_version.py
+++ b/src/increase/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "increase"
-__version__ = "0.260.0"  # x-release-please-version
+__version__ = "0.261.0"  # x-release-please-version
diff --git a/src/increase/resources/simulations/card_authorizations.py b/src/increase/resources/simulations/card_authorizations.py
index 708dee077..d1feb92d8 100644
--- a/src/increase/resources/simulations/card_authorizations.py
+++ b/src/increase/resources/simulations/card_authorizations.py
@@ -68,6 +68,7 @@ def create(
             "invalid_physical_card",
             "missing_original_authorization",
             "failed_3ds_authentication",
+            "suspected_card_testing",
             "suspected_fraud",
         ]
         | NotGiven = NOT_GIVEN,
@@ -138,6 +139,8 @@ def create(
                 incremental authorization does not exist.
               - `failed_3ds_authentication` - The transaction was declined because the 3DS
                 authentication failed.
+              - `suspected_card_testing` - The transaction was suspected to be used by a card
+                tester to test for valid card numbers.
               - `suspected_fraud` - The transaction was suspected to be fraudulent. Please
                 reach out to support@increase.com for more information.
 
@@ -270,6 +273,7 @@ async def create(
             "invalid_physical_card",
             "missing_original_authorization",
             "failed_3ds_authentication",
+            "suspected_card_testing",
             "suspected_fraud",
         ]
         | NotGiven = NOT_GIVEN,
@@ -340,6 +344,8 @@ async def create(
                 incremental authorization does not exist.
               - `failed_3ds_authentication` - The transaction was declined because the 3DS
                 authentication failed.
+              - `suspected_card_testing` - The transaction was suspected to be used by a card
+                tester to test for valid card numbers.
               - `suspected_fraud` - The transaction was suspected to be fraudulent. Please
                 reach out to support@increase.com for more information.
 
diff --git a/src/increase/types/card_payment.py b/src/increase/types/card_payment.py
index 9793d7e1e..3e33714d5 100644
--- a/src/increase/types/card_payment.py
+++ b/src/increase/types/card_payment.py
@@ -1081,6 +1081,7 @@ class ElementCardDecline(BaseModel):
         "invalid_physical_card",
         "missing_original_authorization",
         "failed_3ds_authentication",
+        "suspected_card_testing",
         "suspected_fraud",
     ]
     """Why the transaction was declined.
@@ -1110,6 +1111,8 @@ class ElementCardDecline(BaseModel):
       incremental authorization does not exist.
     - `failed_3ds_authentication` - The transaction was declined because the 3DS
       authentication failed.
+    - `suspected_card_testing` - The transaction was suspected to be used by a card
+      tester to test for valid card numbers.
     - `suspected_fraud` - The transaction was suspected to be fraudulent. Please
       reach out to support@increase.com for more information.
     """
diff --git a/src/increase/types/declined_transaction.py b/src/increase/types/declined_transaction.py
index 7b0334515..a71f24c81 100644
--- a/src/increase/types/declined_transaction.py
+++ b/src/increase/types/declined_transaction.py
@@ -529,6 +529,7 @@ class SourceCardDecline(BaseModel):
         "invalid_physical_card",
         "missing_original_authorization",
         "failed_3ds_authentication",
+        "suspected_card_testing",
         "suspected_fraud",
     ]
     """Why the transaction was declined.
@@ -558,6 +559,8 @@ class SourceCardDecline(BaseModel):
       incremental authorization does not exist.
     - `failed_3ds_authentication` - The transaction was declined because the 3DS
       authentication failed.
+    - `suspected_card_testing` - The transaction was suspected to be used by a card
+      tester to test for valid card numbers.
     - `suspected_fraud` - The transaction was suspected to be fraudulent. Please
       reach out to support@increase.com for more information.
     """
diff --git a/src/increase/types/simulations/card_authorization_create_params.py b/src/increase/types/simulations/card_authorization_create_params.py
index 83b5349b6..d578690fe 100644
--- a/src/increase/types/simulations/card_authorization_create_params.py
+++ b/src/increase/types/simulations/card_authorization_create_params.py
@@ -39,6 +39,7 @@ class CardAuthorizationCreateParams(TypedDict, total=False):
         "invalid_physical_card",
         "missing_original_authorization",
         "failed_3ds_authentication",
+        "suspected_card_testing",
         "suspected_fraud",
     ]
     """Forces a card decline with a specific reason.
@@ -70,6 +71,8 @@ class CardAuthorizationCreateParams(TypedDict, total=False):
       incremental authorization does not exist.
     - `failed_3ds_authentication` - The transaction was declined because the 3DS
       authentication failed.
+    - `suspected_card_testing` - The transaction was suspected to be used by a card
+      tester to test for valid card numbers.
     - `suspected_fraud` - The transaction was suspected to be fraudulent. Please
       reach out to support@increase.com for more information.
     """