diff --git a/pip_audit/_cli.py b/pip_audit/_cli.py
index c6bc7b91..a7c67dfb 100644
--- a/pip_audit/_cli.py
+++ b/pip_audit/_cli.py
@@ -572,11 +572,15 @@ def audit() -> None:  # pragma: no cover
                 fixes.append(fix)
 
     if vuln_count > 0:
+        if vuln_ignore_count:
+            ignored = f", ignored {vuln_ignore_count}"
+        else:
+            ignored = ""
+
         summary_msg = (
             f"Found {vuln_count} known "
             f"{'vulnerability' if vuln_count == 1 else 'vulnerabilities'}"
-            f"{(vuln_ignore_count and ', ignored %d ' % vuln_ignore_count) or ' '}"
-            f"in {pkg_count} {'package' if pkg_count == 1 else 'packages'}"
+            f"{ignored} in {pkg_count} {'package' if pkg_count == 1 else 'packages'}"
         )
         if args.fix:
             summary_msg += (
diff --git a/pyproject.toml b/pyproject.toml
index 931c0459..c23e6a7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ test = [
 lint = [
     # NOTE(ww): ruff is under active development, so we pin conservatively here
     # and let Dependabot periodically perform this update.
-    "ruff < 0.7.5",
+    "ruff < 0.8.1",
     # HACK(ww): interrogate needs setuptools to provide `pkg_resources` on Python 3.12+;
     # remove this when https://github.com/econchick/interrogate/issues/164 is resolved.
     "setuptools",