diff --git a/borgmatic/actions/create.py b/borgmatic/actions/create.py
index 4fdd60ef..8075b34d 100644
--- a/borgmatic/actions/create.py
+++ b/borgmatic/actions/create.py
@@ -50,7 +50,11 @@ def collect_patterns(config):
             borgmatic.borg.pattern.Pattern(source_directory)
             for source_directory in config.get('source_directories', ())
         )
-        + tuple(parse_pattern(pattern_line) for pattern_line in config.get('patterns', ()))
+        + tuple(
+            parse_pattern(pattern_line)
+            for pattern_line in config.get('patterns', ())
+            if not pattern_line.lstrip().startswith('#')
+        )
         + tuple(
             borgmatic.borg.pattern.Pattern(
                 exclude_line,
@@ -64,6 +68,7 @@ def collect_patterns(config):
                 parse_pattern(pattern_line)
                 for filename in config.get('patterns_from', ())
                 for pattern_line in open(filename).readlines()
+                if not pattern_line.lstrip().startswith('#')
             )
         )
         + tuple(
diff --git a/borgmatic/borg/create.py b/borgmatic/borg/create.py
index 39760145..29d23f16 100644
--- a/borgmatic/borg/create.py
+++ b/borgmatic/borg/create.py
@@ -215,7 +215,9 @@ def make_base_create_command(
     if config.get('source_directories_must_exist', False):
         check_all_root_patterns_exist(patterns)
 
-    patterns_file = write_patterns_file(patterns, borgmatic_runtime_directory, log_prefix=repository_path)
+    patterns_file = write_patterns_file(
+        patterns, borgmatic_runtime_directory, log_prefix=repository_path
+    )
     checkpoint_interval = config.get('checkpoint_interval', None)
     checkpoint_volume = config.get('checkpoint_volume', None)
     chunker_params = config.get('chunker_params', None)
diff --git a/borgmatic/hooks/data_source/btrfs.py b/borgmatic/hooks/data_source/btrfs.py
index 2ad7590a..fc135e4d 100644
--- a/borgmatic/hooks/data_source/btrfs.py
+++ b/borgmatic/hooks/data_source/btrfs.py
@@ -73,9 +73,7 @@ def get_subvolumes_for_filesystem(btrfs_command, filesystem_mount_point):
     )
 
 
-Subvolume = collections.namedtuple(
-    'Subvolume', ('path', 'contained_patterns'), defaults=((),)
-)
+Subvolume = collections.namedtuple('Subvolume', ('path', 'contained_patterns'), defaults=((),))
 
 
 def get_subvolumes(btrfs_command, findmnt_command, patterns=None):
@@ -256,7 +254,9 @@ def dump_data_sources(
         for pattern in subvolume.contained_patterns:
             # Update the pattern in place, since pattern order matters to Borg.
             try:
-                patterns[patterns.index(pattern)] = make_borg_snapshot_pattern(subvolume.path, pattern)
+                patterns[patterns.index(pattern)] = make_borg_snapshot_pattern(
+                    subvolume.path, pattern
+                )
             except ValueError:
                 pass
 
diff --git a/borgmatic/hooks/data_source/lvm.py b/borgmatic/hooks/data_source/lvm.py
index d4deffbb..0584e3a2 100644
--- a/borgmatic/hooks/data_source/lvm.py
+++ b/borgmatic/hooks/data_source/lvm.py
@@ -57,9 +57,7 @@ def get_logical_volumes(lsblk_command, patterns=None):
 
     try:
         return tuple(
-            Logical_volume(
-                device['name'], device['path'], device['mountpoint'], contained_patterns
-            )
+            Logical_volume(device['name'], device['path'], device['mountpoint'], contained_patterns)
             for device in devices_info['blockdevices']
             if device['mountpoint'] and device['type'] == 'lvm'
             for contained_patterns in (
@@ -232,11 +230,9 @@ def dump_data_sources(
         for pattern in logical_volume.contained_patterns:
             # Update the pattern in place, since pattern order matters to Borg.
             try:
-                patterns[patterns.index(pattern)] = (
-                    make_borg_snapshot_pattern(
-                        pattern,
-                        normalized_runtime_directory,
-                    )
+                patterns[patterns.index(pattern)] = make_borg_snapshot_pattern(
+                    pattern,
+                    normalized_runtime_directory,
                 )
             except ValueError:
                 pass
diff --git a/borgmatic/hooks/data_source/zfs.py b/borgmatic/hooks/data_source/zfs.py
index d4c1f3b8..4524b1e1 100644
--- a/borgmatic/hooks/data_source/zfs.py
+++ b/borgmatic/hooks/data_source/zfs.py
@@ -252,11 +252,9 @@ def dump_data_sources(
         for pattern in dataset.contained_patterns:
             # Update the pattern in place, since pattern order matters to Borg.
             try:
-                patterns[patterns.index(pattern)] = (
-                    make_borg_snapshot_pattern(
-                        pattern,
-                        normalized_runtime_directory,
-                    )
+                patterns[patterns.index(pattern)] = make_borg_snapshot_pattern(
+                    pattern,
+                    normalized_runtime_directory,
                 )
             except ValueError:
                 pass