diff --git a/src/frostfs_testlib/resources/__init__.py b/src/frostfs_testlib/resources/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/frostfs_testlib/resources/common.py b/src/frostfs_testlib/resources/common.py
new file mode 100644
index 0000000..44f8c77
--- /dev/null
+++ b/src/frostfs_testlib/resources/common.py
@@ -0,0 +1,36 @@
+# ACLs with final flag
+PUBLIC_ACL_F = "1FBFBFFF"
+PRIVATE_ACL_F = "1C8C8CCC"
+READONLY_ACL_F = "1FBF8CFF"
+
+# ACLs without final flag set
+PUBLIC_ACL = "0FBFBFFF"
+INACCESSIBLE_ACL = "40000000"
+STICKY_BIT_PUB_ACL = "3FFFFFFF"
+
+EACL_PUBLIC_READ_WRITE = "eacl-public-read-write"
+
+# Regex patterns of status codes of Container service
+CONTAINER_NOT_FOUND = "code = 3072.*message = container not found"
+
+
+# Regex patterns of status codes of Object service
+MALFORMED_REQUEST = "code = 1024.*message = malformed request"
+OBJECT_ACCESS_DENIED = "code = 2048.*message = access to object operation denied"
+OBJECT_NOT_FOUND = "code = 2049.*message = object not found"
+OBJECT_ALREADY_REMOVED = "code = 2052.*message = object already removed"
+SESSION_NOT_FOUND = "code = 4096.*message = session token not found"
+OUT_OF_RANGE = "code = 2053.*message = out of range"
+# TODO: Due to https://github.com/nspcc-dev/neofs-node/issues/2092 we have to check only codes until fixed
+# OBJECT_IS_LOCKED = "code = 2050.*message = object is locked"
+# LOCK_NON_REGULAR_OBJECT = "code = 2051.*message = ..." will be available once 2092 is fixed
+OBJECT_IS_LOCKED = "code = 2050"
+LOCK_NON_REGULAR_OBJECT = "code = 2051"
+
+LIFETIME_REQUIRED = "either expiration epoch of a lifetime is required"
+LOCK_OBJECT_REMOVAL = "lock object removal"
+LOCK_OBJECT_EXPIRATION = "lock object expiration: {expiration_epoch}; current: {current_epoch}"
+INVALID_RANGE_ZERO_LENGTH = "invalid '{range}' range: zero length"
+INVALID_RANGE_OVERFLOW = "invalid '{range}' range: uint64 overflow"
+INVALID_OFFSET_SPECIFIER = "invalid '{range}' range offset specifier"
+INVALID_LENGTH_SPECIFIER = "invalid '{range}' range length specifier"
diff --git a/src/frostfs_testlib/utils/errors.py b/src/frostfs_testlib/utils/errors.py
new file mode 100644
index 0000000..5a7bee8
--- /dev/null
+++ b/src/frostfs_testlib/utils/errors.py
@@ -0,0 +1,11 @@
+import re
+
+
+def error_matches_status(error: Exception, status_pattern: str) -> bool:
+    """
+    Determines whether exception matches specified status pattern.
+
+    We use re.search() to be consistent with pytest.raises.
+    """
+    match = re.search(status_pattern, str(error))
+    return match is not None