diff --git a/istub.yml b/istub.yml
index 317f34d..4dc48c7 100644
--- a/istub.yml
+++ b/istub.yml
@@ -1,8 +1,23 @@
 packages:
-  - name: botocore
+  - name: s3transfer
     checks:
       stubtest: true
     snapshots:
       stubtest: |-
-        error: not checking stubs due to mypy build errors:
-        ./botocore-stubs/crt/auth.pyi:4: error: Skipping analyzing "awscrt.auth": module is installed, but missing library stubs or py.typed marker
+        error: s3transfer.compat.BaseManager.shutdown is not present at runtime
+        Stub: at line 152
+        def (self: multiprocessing.managers.BaseManager)
+        Runtime:
+        MISSING
+
+        error: s3transfer.processpool.BaseManager.shutdown is not present at runtime
+        Stub: at line 152
+        def (self: multiprocessing.managers.BaseManager)
+        Runtime:
+        MISSING
+
+        error: s3transfer.processpool.TransferMonitorManager.TransferMonitor is not present in stub
+        Stub:
+        MISSING
+        Runtime: at line 722 in file ./multiprocessing/managers.py
+        <function BaseManager.register.<locals>.temp at HASH>
diff --git a/istub/checks/base.py b/istub/checks/base.py
index bf9f6a2..1120222 100644
--- a/istub/checks/base.py
+++ b/istub/checks/base.py
@@ -51,7 +51,7 @@ def get_diff(self, data: List[str]) -> List[str]:
 
         differ = difflib.Differ()
         diff = differ.compare(old_data, data)
-        return [i for i in diff if i.startswith("-") or i.startswith("+")]
+        return [i for i in diff if not self.is_ignored_line_diff(i)]
 
     def get_call_output(
         self,
@@ -77,3 +77,11 @@ def set_snapshot(self, data: Iterable[str]) -> None:
         Set snapshot data.
         """
         self.package.set_snapshot(self.NAME, data)
+
+    def is_ignored_line_diff(self, line: str) -> bool:
+        """
+        Whether line is ignored in diff.
+        """
+        if line.startswith("+") or line.startswith("-"):
+            return False
+        return True
diff --git a/istub/checks/stubtest.py b/istub/checks/stubtest.py
index 9d6fdcc..692075a 100644
--- a/istub/checks/stubtest.py
+++ b/istub/checks/stubtest.py
@@ -17,3 +17,15 @@ def run(self) -> str:
             capture_stderr=False,
         )
         return "\n".join(output.splitlines()[:-1])
+
+    def is_ignored_line_diff(self, line: str) -> bool:
+        """
+        Whether line is ignored in diff.
+        """
+        if super().is_ignored_line_diff(line):
+            return True
+
+        if "at line" in line:
+            return True
+
+        return False
diff --git a/poetry.lock b/poetry.lock
index 62d6931..8e02aed 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -63,7 +63,7 @@ crt = ["awscrt (==0.13.8)"]
 
 [[package]]
 name = "botocore-stubs"
-version = "1.27.42.post1"
+version = "1.27.42.post2"
 description = "Type annotations and code completion for botocore"
 category = "dev"
 optional = false
@@ -444,6 +444,20 @@ typing-extensions = {version = ">=4.0.0,<5.0", markers = "python_version < \"3.9
 [package.extras]
 jupyter = ["ipywidgets (>=7.5.1,<8.0.0)"]
 
+[[package]]
+name = "s3transfer"
+version = "0.6.0"
+description = "An Amazon S3 Transfer Manager"
+category = "dev"
+optional = false
+python-versions = ">= 3.7"
+
+[package.dependencies]
+botocore = ">=1.12.36,<2.0a.0"
+
+[package.extras]
+crt = ["botocore[crt] (>=1.20.29,<2.0a.0)"]
+
 [[package]]
 name = "secretstorage"
 version = "3.3.2"
@@ -526,6 +540,14 @@ python-versions = "*"
 [package.dependencies]
 types-urllib3 = "<1.27"
 
+[[package]]
+name = "types-s3transfer"
+version = "0.6.0.post4"
+description = "Type annotations and code completion for s3transfer"
+category = "dev"
+optional = false
+python-versions = ">=3.7,<4.0"
+
 [[package]]
 name = "types-urllib3"
 version = "1.26.19"
@@ -589,7 +611,7 @@ testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "52b0f0a5b5e9407934cb0d93efb7c15e68d9fc53581c3e4bdb5c2b9174cad745"
+content-hash = "cf9b8a27b74f9db46296c0296579620201ccbeffe65ebb492122e9e6d2a26bed"
 
 [metadata.files]
 awscrt = []
@@ -627,8 +649,8 @@ botocore = [
     {file = "botocore-1.27.42.tar.gz", hash = "sha256:38a180a6666c5a9b069a75ec3cf374ff2a64c3e90c9f24a916858bcdeb04456d"},
 ]
 botocore-stubs = [
-    {file = "botocore-stubs-1.27.42.post1.tar.gz", hash = "sha256:e5feb509594148f6311bc785d35a285016d9979456336cebce15ee4fcae20d9e"},
-    {file = "botocore_stubs-1.27.42.post1-py3-none-any.whl", hash = "sha256:59115ed3ea774ffc5a973a962c316a90378a02758d368675af7f136f55844da1"},
+    {file = "botocore-stubs-1.27.42.post2.tar.gz", hash = "sha256:f87bac3f2156338173bdae804092addf64572c264a41bf90e53d5a268d85681b"},
+    {file = "botocore_stubs-1.27.42.post2-py3-none-any.whl", hash = "sha256:f51a788f190eea6c825fa0f30183d5243108368f39d3074d694daeb01fd04969"},
 ]
 certifi = [
     {file = "certifi-2022.6.15-py3-none-any.whl", hash = "sha256:fe86415d55e84719d75f8b69414f6438ac3547d2078ab91b67e779ef69378412"},
@@ -775,6 +797,10 @@ rfc3986 = [
     {file = "rfc3986-2.0.0.tar.gz", hash = "sha256:97aacf9dbd4bfd829baad6e6309fa6573aaf1be3f6fa735c8ab05e46cecb261c"},
 ]
 rich = []
+s3transfer = [
+    {file = "s3transfer-0.6.0-py3-none-any.whl", hash = "sha256:06176b74f3a15f61f1b4f25a1fc29a4429040b7647133a463da8fa5bd28d5ecd"},
+    {file = "s3transfer-0.6.0.tar.gz", hash = "sha256:2ed07d3866f523cc561bf4a00fc5535827981b117dd7876f036b0c1aca42c947"},
+]
 secretstorage = [
     {file = "SecretStorage-3.3.2-py3-none-any.whl", hash = "sha256:755dc845b6ad76dcbcbc07ea3da75ae54bb1ea529eb72d15f83d26499a5df319"},
     {file = "SecretStorage-3.3.2.tar.gz", hash = "sha256:0a8eb9645b320881c222e827c26f4cfcf55363e8b374a021981ef886657a912f"},
@@ -826,6 +852,10 @@ types-requests = [
     {file = "types-requests-2.28.6.tar.gz", hash = "sha256:cf3383bbd79394bf051a0a9202d6831fa962f186f923c178f7c059e3424bd00e"},
     {file = "types_requests-2.28.6-py3-none-any.whl", hash = "sha256:d8d7607419cd4b41a7b9497e15e8c0bad78d50df43c48ad25bc526a11518c3a9"},
 ]
+types-s3transfer = [
+    {file = "types-s3transfer-0.6.0.post4.tar.gz", hash = "sha256:0c45331bfd0db210f5043efd2bc3ecd4b3482a02c28faea33edf719b6be38431"},
+    {file = "types_s3transfer-0.6.0.post4-py3-none-any.whl", hash = "sha256:78f9ea029fedc97e1a5d323edd149a827d4ab361d11cd92bb1b5f235ff84ba72"},
+]
 types-urllib3 = [
     {file = "types-urllib3-1.26.19.tar.gz", hash = "sha256:45b307bdb73d2eac0c2fb1386da97e51c9ae7f1474ef35f61024c3084b6bf371"},
     {file = "types_urllib3-1.26.19-py3-none-any.whl", hash = "sha256:540bf5a42ba09a4a58c406cb2c2c8654b0aadf413f8337fdc184711ab48b900c"},
diff --git a/pyproject.toml b/pyproject.toml
index 6f72bb5..f548da8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,6 @@ pip = "*"
 pyyaml = "*"
 
 [tool.poetry.dev-dependencies]
-awscrt = "*"
 isort = "*"
 mypy = "*"
 black = "*"
@@ -71,8 +70,10 @@ flake8 = "*"
 vulture = "*"
 twine = "*"
 types-pyyaml = "*"
-botocore = "*"
+s3transfer = "*"
+awscrt = "*"
 botocore-stubs = "*"
+types-s3transfer = "*"
 types-requests = "*"
 
 [build-system]