diff --git a/platformio/commands/check/command.py b/platformio/commands/check/command.py
index 24575436..9761c863 100644
--- a/platformio/commands/check/command.py
+++ b/platformio/commands/check/command.py
@@ -109,7 +109,7 @@ def cli(
             tool_options = dict(
                 verbose=verbose,
                 silent=silent,
-                patterns=pattern or env_options.get("check_patterns", default_patterns),
+                pattern=pattern or env_options.get("check_pattern", default_patterns),
                 flags=flags or env_options.get("check_flags"),
                 severity=[DefectItem.SEVERITY_LABELS[DefectItem.SEVERITY_HIGH]]
                 if silent
diff --git a/platformio/commands/check/tools/base.py b/platformio/commands/check/tools/base.py
index 59951288..6a0d10b2 100644
--- a/platformio/commands/check/tools/base.py
+++ b/platformio/commands/check/tools/base.py
@@ -134,7 +134,7 @@ class CheckToolBase(object):  # pylint: disable=too-many-instance-attributes
                 return
             result.append(os.path.abspath(path))
 
-        for pattern in self.options["patterns"]:
+        for pattern in self.options["pattern"]:
             for item in glob.glob(pattern):
                 if not os.path.isdir(item):
                     _add_file(item)