diff --git a/mergify_cli/ci/cli.py b/mergify_cli/ci/cli.py
index 80caa08d..a7d64c44 100644
--- a/mergify_cli/ci/cli.py
+++ b/mergify_cli/ci/cli.py
@@ -4,6 +4,7 @@
 from mergify_cli.ci import detector
 from mergify_cli.ci.junit_processing import cli as junit_processing_cli
 from mergify_cli.ci.scopes import cli as scopes_cli
+from mergify_cli.ci.scopes import exceptions as scopes_exc
 
 
 class JUnitFile(click.Path):
@@ -214,7 +215,7 @@ def scopes(
 ) -> None:
     try:
         scopes = scopes_cli.detect(config_path=config_path)
-    except scopes_cli.ScopesError as e:
+    except scopes_exc.ScopesError as e:
         raise click.ClickException(str(e)) from e
 
     if write is not None:
@@ -273,7 +274,7 @@ async def scopes_send(  # noqa: PLR0913, PLR0917
     if file is not None:
         try:
             dump = scopes_cli.DetectedScope.load_from_file(file)
-        except scopes_cli.ScopesError as e:
+        except scopes_exc.ScopesError as e:
             raise click.ClickException(str(e)) from e
         scopes.extend(dump.scopes)
 
diff --git a/mergify_cli/ci/scopes/base_detector.py b/mergify_cli/ci/scopes/base_detector.py
index d8068d8b..ac3316bf 100644
--- a/mergify_cli/ci/scopes/base_detector.py
+++ b/mergify_cli/ci/scopes/base_detector.py
@@ -4,10 +4,14 @@
 import os
 import typing
 
-import click
 import yaml
 
 from mergify_cli import utils
+from mergify_cli.ci.scopes import exceptions
+
+
+class BaseNotFoundError(exceptions.ScopesError):
+    pass
 
 
 class MergeQueuePullRequest(typing.TypedDict):
@@ -92,10 +96,5 @@ def detect() -> Base:
     if base_ref:
         return Base(base_ref, is_merge_queue=False)
 
-    msg = (
-        "Could not detect base SHA. Ensure checkout has sufficient history "
-        "(e.g., actions/checkout with fetch-depth: 0) or provide GITHUB_EVENT_PATH / GITHUB_BASE_REF."
-    )
-    raise click.ClickException(
-        msg,
-    )
+    msg = "Could not detect base SHA. Provide GITHUB_EVENT_PATH / GITHUB_BASE_REF."
+    raise BaseNotFoundError(msg)
diff --git a/mergify_cli/ci/scopes/changed_files.py b/mergify_cli/ci/scopes/changed_files.py
index a402994d..57960529 100644
--- a/mergify_cli/ci/scopes/changed_files.py
+++ b/mergify_cli/ci/scopes/changed_files.py
@@ -3,11 +3,13 @@
 import subprocess
 import sys
 
+from mergify_cli.ci.scopes import exceptions
+
 
 COMMITS_BATCH_SIZE = 100
 
 
-class ChangedFilesError(Exception):
+class ChangedFilesError(exceptions.ScopesError):
     pass
 
 
diff --git a/mergify_cli/ci/scopes/cli.py b/mergify_cli/ci/scopes/cli.py
index ea3c1c04..d5db3356 100644
--- a/mergify_cli/ci/scopes/cli.py
+++ b/mergify_cli/ci/scopes/cli.py
@@ -11,6 +11,7 @@
 from mergify_cli import utils
 from mergify_cli.ci.scopes import base_detector
 from mergify_cli.ci.scopes import changed_files
+from mergify_cli.ci.scopes import exceptions
 
 
 if typing.TYPE_CHECKING:
@@ -21,15 +22,7 @@
 SCOPE_NAME_RE = r"^[A-Za-z0-9_-]+$"
 
 
-class ScopesError(Exception):
-    pass
-
-
-class ConfigInvalidError(ScopesError):
-    pass
-
-
-class ChangedFilesError(ScopesError):
+class ConfigInvalidError(exceptions.ScopesError):
     pass
 
 
@@ -111,7 +104,7 @@ def maybe_write_github_outputs(
             fh.write(f"{key}={val}\n")
 
 
-class InvalidDetectedScopeError(ScopesError):
+class InvalidDetectedScopeError(exceptions.ScopesError):
     pass
 
 
@@ -135,10 +128,7 @@ def load_from_file(cls, filename: str) -> DetectedScope:
 def detect(config_path: str) -> DetectedScope:
     cfg = Config.from_yaml(config_path)
     base = base_detector.detect()
-    try:
-        changed = changed_files.git_changed_files(base.ref)
-    except changed_files.ChangedFilesError as e:
-        raise ChangedFilesError(str(e))
+    changed = changed_files.git_changed_files(base.ref)
     scopes_hit, per_scope = match_scopes(cfg, changed)
 
     all_scopes = set(cfg.scopes.keys())
diff --git a/mergify_cli/ci/scopes/exceptions.py b/mergify_cli/ci/scopes/exceptions.py
new file mode 100644
index 00000000..80a4f9f7
--- /dev/null
+++ b/mergify_cli/ci/scopes/exceptions.py
@@ -0,0 +1,2 @@
+class ScopesError(Exception):
+    pass
diff --git a/mergify_cli/tests/ci/scopes/test_base_detector.py b/mergify_cli/tests/ci/scopes/test_base_detector.py
index 2d893b54..4fa6a23a 100644
--- a/mergify_cli/tests/ci/scopes/test_base_detector.py
+++ b/mergify_cli/tests/ci/scopes/test_base_detector.py
@@ -1,7 +1,6 @@
 import json
 import pathlib
 
-import click
 import pytest
 
 from mergify_cli.ci.scopes import base_detector
@@ -63,7 +62,10 @@ def test_detect_base_no_info(monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.delenv("GITHUB_EVENT_PATH", raising=False)
     monkeypatch.delenv("GITHUB_BASE_REF", raising=False)
 
-    with pytest.raises(click.ClickException, match="Could not detect base SHA"):
+    with pytest.raises(
+        base_detector.BaseNotFoundError,
+        match="Could not detect base SHA",
+    ):
         base_detector.detect()