diff --git a/beets/dbcore/query.py b/beets/dbcore/query.py
index c7ca44452..9812a7528 100644
--- a/beets/dbcore/query.py
+++ b/beets/dbcore/query.py
@@ -16,6 +16,7 @@
 
 from __future__ import annotations
 
+import os
 import re
 import unicodedata
 from abc import ABC, abstractmethod
@@ -36,6 +37,11 @@ if TYPE_CHECKING:
 else:
     P = TypeVar("P")
 
+# To use the SQLite "blob" type, it doesn't suffice to provide a byte
+# string; SQLite treats that as encoded text. Wrapping it in a
+# `memoryview` tells it that we actually mean non-text data.
+BLOB_TYPE = memoryview
+
 
 class ParsingError(ValueError):
     """Abstract class for any unparsable user-requested album/query
@@ -267,6 +273,97 @@ class SubstringQuery(StringFieldQuery[str]):
         return pattern.lower() in value.lower()
 
 
+class PathQuery(FieldQuery[bytes]):
+    """A query that matches all items under a given path.
+
+    Matching can either be case-insensitive or case-sensitive. By
+    default, the behavior depends on the OS: case-insensitive on Windows
+    and case-sensitive otherwise.
+    """
+
+    # For tests
+    force_implicit_query_detection = False
+
+    def __init__(self, field, pattern, fast=True, case_sensitive=None):
+        """Create a path query.
+
+        `pattern` must be a path, either to a file or a directory.
+
+        `case_sensitive` can be a bool or `None`, indicating that the
+        behavior should depend on the filesystem.
+        """
+        super().__init__(field, pattern, fast)
+
+        path = util.normpath(pattern)
+
+        # By default, the case sensitivity depends on the filesystem
+        # that the query path is located on.
+        if case_sensitive is None:
+            case_sensitive = util.case_sensitive(path)
+        self.case_sensitive = case_sensitive
+
+        # Use a normalized-case pattern for case-insensitive matches.
+        if not case_sensitive:
+            # We need to lowercase the entire path, not just the pattern.
+            # In particular, on Windows, the drive letter is otherwise not
+            # lowercased.
+            # This also ensures that the `match()` method below and the SQL
+            # from `col_clause()` do the same thing.
+            path = path.lower()
+
+        # Match the path as a single file.
+        self.file_path = path
+        # As a directory (prefix).
+        self.dir_path = os.path.join(path, b"")
+
+    @classmethod
+    def is_path_query(cls, query_part):
+        """Try to guess whether a unicode query part is a path query.
+
+        Condition: separator precedes colon and the file exists.
+        """
+        colon = query_part.find(":")
+        if colon != -1:
+            query_part = query_part[:colon]
+
+        # Test both `sep` and `altsep` (i.e., both slash and backslash on
+        # Windows).
+        if not (
+            os.sep in query_part or (os.altsep and os.altsep in query_part)
+        ):
+            return False
+
+        if cls.force_implicit_query_detection:
+            return True
+        return os.path.exists(util.syspath(util.normpath(query_part)))
+
+    def match(self, item):
+        path = item.path if self.case_sensitive else item.path.lower()
+        return (path == self.file_path) or path.startswith(self.dir_path)
+
+    def col_clause(self):
+        file_blob = BLOB_TYPE(self.file_path)
+        dir_blob = BLOB_TYPE(self.dir_path)
+
+        if self.case_sensitive:
+            query_part = "({0} = ?) || (substr({0}, 1, ?) = ?)"
+        else:
+            query_part = "(BYTELOWER({0}) = BYTELOWER(?)) || \
+                         (substr(BYTELOWER({0}), 1, ?) = BYTELOWER(?))"
+
+        return query_part.format(self.field), (
+            file_blob,
+            len(dir_blob),
+            dir_blob,
+        )
+
+    def __repr__(self) -> str:
+        return (
+            f"{self.__class__.__name__}({self.field!r}, {self.pattern!r}, "
+            f"fast={self.fast}, case_sensitive={self.case_sensitive})"
+        )
+
+
 class RegexpQuery(StringFieldQuery[Pattern[str]]):
     """A query that matches a regular expression in a specific Model field.
 
@@ -844,6 +941,24 @@ class DurationQuery(NumericQuery):
                 )
 
 
+class SingletonQuery(FieldQuery[str]):
+    """This query is responsible for the 'singleton' lookup.
+
+    It is based on the FieldQuery and constructs a SQL clause
+    'album_id is NULL' which yields the same result as the previous filter
+    in Python but is more performant since it's done in SQL.
+
+    Using util.str2bool ensures that lookups like singleton:true, singleton:1
+    and singleton:false, singleton:0 are handled consistently.
+    """
+
+    def __new__(cls, field: str, value: str, *args, **kwargs):
+        query = NoneQuery("album_id")
+        if util.str2bool(value):
+            return query
+        return NotQuery(query)
+
+
 # Sorting.
 
 
diff --git a/beets/dbcore/types.py b/beets/dbcore/types.py
index 2a64b2ed9..27cd04b92 100644
--- a/beets/dbcore/types.py
+++ b/beets/dbcore/types.py
@@ -16,19 +16,18 @@
 
 from __future__ import annotations
 
+import re
+import time
 import typing
 from abc import ABC
 from typing import TYPE_CHECKING, Any, Generic, TypeVar, cast
 
-from beets.util import str2bool
+from beets import util
 
-from .query import (
-    BooleanQuery,
-    FieldQueryType,
-    NumericQuery,
-    SQLiteType,
-    SubstringQuery,
-)
+from . import query
+
+SQLiteType = query.SQLiteType
+BLOB_TYPE = query.BLOB_TYPE
 
 
 class ModelType(typing.Protocol):
@@ -61,7 +60,7 @@ class Type(ABC, Generic[T, N]):
     """The SQLite column type for the value.
     """
 
-    query: FieldQueryType = SubstringQuery
+    query: query.FieldQueryType = query.SubstringQuery
     """The `Query` subclass to be used when querying the field.
     """
 
@@ -160,7 +159,7 @@ class BaseInteger(Type[int, N]):
     """A basic integer type."""
 
     sql = "INTEGER"
-    query = NumericQuery
+    query = query.NumericQuery
     model_type = int
 
     def normalize(self, value: Any) -> int | N:
@@ -241,7 +240,7 @@ class BaseFloat(Type[float, N]):
     """
 
     sql = "REAL"
-    query: FieldQueryType = NumericQuery
+    query: query.FieldQueryType = query.NumericQuery
     model_type = float
 
     def __init__(self, digits: int = 1):
@@ -271,7 +270,7 @@ class BaseString(Type[T, N]):
     """A Unicode string type."""
 
     sql = "TEXT"
-    query = SubstringQuery
+    query = query.SubstringQuery
 
     def normalize(self, value: Any) -> T | N:
         if value is None:
@@ -312,14 +311,144 @@ class Boolean(Type):
     """A boolean type."""
 
     sql = "INTEGER"
-    query = BooleanQuery
+    query = query.BooleanQuery
     model_type = bool
 
     def format(self, value: bool) -> str:
         return str(bool(value))
 
     def parse(self, string: str) -> bool:
-        return str2bool(string)
+        return util.str2bool(string)
+
+
+class DateType(Float):
+    # TODO representation should be `datetime` object
+    # TODO distinguish between date and time types
+    query = query.DateQuery
+
+    def format(self, value):
+        return time.strftime(
+            beets.config["time_format"].as_str(), time.localtime(value or 0)
+        )
+
+    def parse(self, string):
+        try:
+            # Try a formatted date string.
+            return time.mktime(
+                time.strptime(string, beets.config["time_format"].as_str())
+            )
+        except ValueError:
+            # Fall back to a plain timestamp number.
+            try:
+                return float(string)
+            except ValueError:
+                return self.null
+
+
+class PathType(Type[bytes, bytes]):
+    """A dbcore type for filesystem paths.
+
+    These are represented as `bytes` objects, in keeping with
+    the Unix filesystem abstraction.
+    """
+
+    sql = "BLOB"
+    query = query.PathQuery
+    model_type = bytes
+
+    def __init__(self, nullable=False):
+        """Create a path type object.
+
+        `nullable` controls whether the type may be missing, i.e., None.
+        """
+        self.nullable = nullable
+
+    @property
+    def null(self):
+        if self.nullable:
+            return None
+        else:
+            return b""
+
+    def format(self, value):
+        return util.displayable_path(value)
+
+    def parse(self, string):
+        return util.normpath(util.bytestring_path(string))
+
+    def normalize(self, value):
+        if isinstance(value, str):
+            # Paths stored internally as encoded bytes.
+            return util.bytestring_path(value)
+
+        elif isinstance(value, BLOB_TYPE):
+            # We unwrap buffers to bytes.
+            return bytes(value)
+
+        else:
+            return value
+
+    def from_sql(self, sql_value):
+        return self.normalize(sql_value)
+
+    def to_sql(self, value):
+        if isinstance(value, bytes):
+            value = BLOB_TYPE(value)
+        return value
+
+
+class MusicalKey(String):
+    """String representing the musical key of a song.
+
+    The standard format is C, Cm, C#, C#m, etc.
+    """
+
+    ENHARMONIC = {
+        r"db": "c#",
+        r"eb": "d#",
+        r"gb": "f#",
+        r"ab": "g#",
+        r"bb": "a#",
+    }
+
+    null = None
+
+    def parse(self, key):
+        key = key.lower()
+        for flat, sharp in self.ENHARMONIC.items():
+            key = re.sub(flat, sharp, key)
+        key = re.sub(r"[\W\s]+minor", "m", key)
+        key = re.sub(r"[\W\s]+major", "", key)
+        return key.capitalize()
+
+    def normalize(self, key):
+        if key is None:
+            return None
+        else:
+            return self.parse(key)
+
+
+class DurationType(Float):
+    """Human-friendly (M:SS) representation of a time interval."""
+
+    query = query.DurationQuery
+
+    def format(self, value):
+        if not beets.config["format_raw_length"].get(bool):
+            return util.human_seconds_short(value or 0.0)
+        else:
+            return value
+
+    def parse(self, string):
+        try:
+            # Try to format back hh:ss to seconds.
+            return util.raw_seconds_short(string)
+        except ValueError:
+            # Fall back to a plain float.
+            try:
+                return float(string)
+            except ValueError:
+                return self.null
 
 
 # Shared instances of common types.
@@ -331,6 +460,7 @@ FLOAT = Float()
 NULL_FLOAT = NullFloat()
 STRING = String()
 BOOLEAN = Boolean()
+DATE = DateType()
 SEMICOLON_SPACE_DSV = DelimitedString(delimiter="; ")
 
 # Will set the proper null char in mediafile
diff --git a/beets/library.py b/beets/library.py
index 271059c69..5a692ef1c 100644
--- a/beets/library.py
+++ b/beets/library.py
@@ -17,7 +17,6 @@
 from __future__ import annotations
 
 import os
-import re
 import shlex
 import string
 import sys
@@ -46,259 +45,9 @@ from beets.util.functemplate import Template, template
 if TYPE_CHECKING:
     from .dbcore.query import FieldQuery, FieldQueryType
 
-# To use the SQLite "blob" type, it doesn't suffice to provide a byte
-# string; SQLite treats that as encoded text. Wrapping it in a
-# `memoryview` tells it that we actually mean non-text data.
-BLOB_TYPE = memoryview
-
 log = logging.getLogger("beets")
 
 
-# Library-specific query types.
-
-
-class SingletonQuery(dbcore.FieldQuery[str]):
-    """This query is responsible for the 'singleton' lookup.
-
-    It is based on the FieldQuery and constructs a SQL clause
-    'album_id is NULL' which yields the same result as the previous filter
-    in Python but is more performant since it's done in SQL.
-
-    Using util.str2bool ensures that lookups like singleton:true, singleton:1
-    and singleton:false, singleton:0 are handled consistently.
-    """
-
-    def __new__(cls, field: str, value: str, *args, **kwargs):
-        query = dbcore.query.NoneQuery("album_id")
-        if util.str2bool(value):
-            return query
-        return dbcore.query.NotQuery(query)
-
-
-class PathQuery(dbcore.FieldQuery[bytes]):
-    """A query that matches all items under a given path.
-
-    Matching can either be case-insensitive or case-sensitive. By
-    default, the behavior depends on the OS: case-insensitive on Windows
-    and case-sensitive otherwise.
-    """
-
-    # For tests
-    force_implicit_query_detection = False
-
-    def __init__(self, field, pattern, fast=True, case_sensitive=None):
-        """Create a path query.
-
-        `pattern` must be a path, either to a file or a directory.
-
-        `case_sensitive` can be a bool or `None`, indicating that the
-        behavior should depend on the filesystem.
-        """
-        super().__init__(field, pattern, fast)
-
-        path = util.normpath(pattern)
-
-        # By default, the case sensitivity depends on the filesystem
-        # that the query path is located on.
-        if case_sensitive is None:
-            case_sensitive = util.case_sensitive(path)
-        self.case_sensitive = case_sensitive
-
-        # Use a normalized-case pattern for case-insensitive matches.
-        if not case_sensitive:
-            # We need to lowercase the entire path, not just the pattern.
-            # In particular, on Windows, the drive letter is otherwise not
-            # lowercased.
-            # This also ensures that the `match()` method below and the SQL
-            # from `col_clause()` do the same thing.
-            path = path.lower()
-
-        # Match the path as a single file.
-        self.file_path = path
-        # As a directory (prefix).
-        self.dir_path = os.path.join(path, b"")
-
-    @classmethod
-    def is_path_query(cls, query_part):
-        """Try to guess whether a unicode query part is a path query.
-
-        Condition: separator precedes colon and the file exists.
-        """
-        colon = query_part.find(":")
-        if colon != -1:
-            query_part = query_part[:colon]
-
-        # Test both `sep` and `altsep` (i.e., both slash and backslash on
-        # Windows).
-        if not (
-            os.sep in query_part or (os.altsep and os.altsep in query_part)
-        ):
-            return False
-
-        if cls.force_implicit_query_detection:
-            return True
-        return os.path.exists(syspath(normpath(query_part)))
-
-    def match(self, item):
-        path = item.path if self.case_sensitive else item.path.lower()
-        return (path == self.file_path) or path.startswith(self.dir_path)
-
-    def col_clause(self):
-        file_blob = BLOB_TYPE(self.file_path)
-        dir_blob = BLOB_TYPE(self.dir_path)
-
-        if self.case_sensitive:
-            query_part = "({0} = ?) || (substr({0}, 1, ?) = ?)"
-        else:
-            query_part = "(BYTELOWER({0}) = BYTELOWER(?)) || \
-                         (substr(BYTELOWER({0}), 1, ?) = BYTELOWER(?))"
-
-        return query_part.format(self.field), (
-            file_blob,
-            len(dir_blob),
-            dir_blob,
-        )
-
-    def __repr__(self) -> str:
-        return (
-            f"{self.__class__.__name__}({self.field!r}, {self.pattern!r}, "
-            f"fast={self.fast}, case_sensitive={self.case_sensitive})"
-        )
-
-
-# Library-specific field types.
-
-
-class DateType(types.Float):
-    # TODO representation should be `datetime` object
-    # TODO distinguish between date and time types
-    query = dbcore.query.DateQuery
-
-    def format(self, value):
-        return time.strftime(
-            beets.config["time_format"].as_str(), time.localtime(value or 0)
-        )
-
-    def parse(self, string):
-        try:
-            # Try a formatted date string.
-            return time.mktime(
-                time.strptime(string, beets.config["time_format"].as_str())
-            )
-        except ValueError:
-            # Fall back to a plain timestamp number.
-            try:
-                return float(string)
-            except ValueError:
-                return self.null
-
-
-class PathType(types.Type[bytes, bytes]):
-    """A dbcore type for filesystem paths.
-
-    These are represented as `bytes` objects, in keeping with
-    the Unix filesystem abstraction.
-    """
-
-    sql = "BLOB"
-    query = PathQuery
-    model_type = bytes
-
-    def __init__(self, nullable=False):
-        """Create a path type object.
-
-        `nullable` controls whether the type may be missing, i.e., None.
-        """
-        self.nullable = nullable
-
-    @property
-    def null(self):
-        if self.nullable:
-            return None
-        else:
-            return b""
-
-    def format(self, value):
-        return util.displayable_path(value)
-
-    def parse(self, string):
-        return normpath(bytestring_path(string))
-
-    def normalize(self, value):
-        if isinstance(value, str):
-            # Paths stored internally as encoded bytes.
-            return bytestring_path(value)
-
-        elif isinstance(value, BLOB_TYPE):
-            # We unwrap buffers to bytes.
-            return bytes(value)
-
-        else:
-            return value
-
-    def from_sql(self, sql_value):
-        return self.normalize(sql_value)
-
-    def to_sql(self, value):
-        if isinstance(value, bytes):
-            value = BLOB_TYPE(value)
-        return value
-
-
-class MusicalKey(types.String):
-    """String representing the musical key of a song.
-
-    The standard format is C, Cm, C#, C#m, etc.
-    """
-
-    ENHARMONIC = {
-        r"db": "c#",
-        r"eb": "d#",
-        r"gb": "f#",
-        r"ab": "g#",
-        r"bb": "a#",
-    }
-
-    null = None
-
-    def parse(self, key):
-        key = key.lower()
-        for flat, sharp in self.ENHARMONIC.items():
-            key = re.sub(flat, sharp, key)
-        key = re.sub(r"[\W\s]+minor", "m", key)
-        key = re.sub(r"[\W\s]+major", "", key)
-        return key.capitalize()
-
-    def normalize(self, key):
-        if key is None:
-            return None
-        else:
-            return self.parse(key)
-
-
-class DurationType(types.Float):
-    """Human-friendly (M:SS) representation of a time interval."""
-
-    query = dbcore.query.DurationQuery
-
-    def format(self, value):
-        if not beets.config["format_raw_length"].get(bool):
-            return beets.ui.human_seconds_short(value or 0.0)
-        else:
-            return value
-
-    def parse(self, string):
-        try:
-            # Try to format back hh:ss to seconds.
-            return util.raw_seconds_short(string)
-        except ValueError:
-            # Fall back to a plain float.
-            try:
-                return float(string)
-            except ValueError:
-                return self.null
-
-
 # Special path format key.
 PF_KEY_DEFAULT = "default"
 
@@ -517,7 +266,7 @@ class Item(LibModel):
     _flex_table = "item_attributes"
     _fields = {
         "id": types.PRIMARY_ID,
-        "path": PathType(),
+        "path": types.PathType(),
         "album_id": types.FOREIGN_ID,
         "title": types.STRING,
         "artist": types.STRING,
@@ -596,8 +345,8 @@ class Item(LibModel):
         "original_year": types.PaddedInt(4),
         "original_month": types.PaddedInt(2),
         "original_day": types.PaddedInt(2),
-        "initial_key": MusicalKey(),
-        "length": DurationType(),
+        "initial_key": types.MusicalKey(),
+        "length": types.DurationType(),
         "bitrate": types.ScaledInt(1000, "kbps"),
         "bitrate_mode": types.STRING,
         "encoder_info": types.STRING,
@@ -606,8 +355,8 @@ class Item(LibModel):
         "samplerate": types.ScaledInt(1000, "kHz"),
         "bitdepth": types.INTEGER,
         "channels": types.INTEGER,
-        "mtime": DateType(),
-        "added": DateType(),
+        "mtime": types.DATE,
+        "added": types.DATE,
     }
 
     _search_fields = (
@@ -641,7 +390,7 @@ class Item(LibModel):
 
     _sorts = {"artist": dbcore.query.SmartArtistSort}
 
-    _queries = {"singleton": SingletonQuery}
+    _queries = {"singleton": dbcore.query.SingletonQuery}
 
     _format_config_key = "format_item"
 
@@ -717,7 +466,7 @@ class Item(LibModel):
         if key == "path":
             if isinstance(value, str):
                 value = bytestring_path(value)
-            elif isinstance(value, BLOB_TYPE):
+            elif isinstance(value, types.BLOB_TYPE):
                 value = bytes(value)
         elif key == "album_id":
             self._cached_album = None
@@ -1161,8 +910,8 @@ class Album(LibModel):
     _always_dirty = True
     _fields = {
         "id": types.PRIMARY_ID,
-        "artpath": PathType(True),
-        "added": DateType(),
+        "artpath": types.PathType(True),
+        "added": types.DATE,
         "albumartist": types.STRING,
         "albumartist_sort": types.STRING,
         "albumartist_credit": types.STRING,
@@ -1208,7 +957,7 @@ class Album(LibModel):
     _search_fields = ("album", "albumartist", "genre")
 
     _types = {
-        "path": PathType(),
+        "path": types.PathType(),
         "data_source": types.STRING,
     }
 
@@ -1563,7 +1312,10 @@ def parse_query_parts(parts, model_cls):
 
     # Special-case path-like queries, which are non-field queries
     # containing path separators (/).
-    parts = [f"path:{s}" if PathQuery.is_path_query(s) else s for s in parts]
+    parts = [
+        f"path:{s}" if dbcore.query.PathQuery.is_path_query(s) else s
+        for s in parts
+    ]
 
     case_insensitive = beets.config["sort_case_insensitive"].get(bool)
 
diff --git a/beets/ui/__init__.py b/beets/ui/__init__.py
index a6f615b45..f1aac766f 100644
--- a/beets/ui/__init__.py
+++ b/beets/ui/__init__.py
@@ -477,14 +477,6 @@ def human_seconds(interval):
     return f"{interval:3.1f} {suffix}s"
 
 
-def human_seconds_short(interval):
-    """Formats a number of seconds as a short human-readable M:SS
-    string.
-    """
-    interval = int(interval)
-    return "%i:%02i" % (interval // 60, interval % 60)
-
-
 # Colorization.
 
 # ANSI terminal colorization code heavily inspired by pygments:
diff --git a/beets/ui/commands.py b/beets/ui/commands.py
index f42291019..fb9ca8b89 100755
--- a/beets/ui/commands.py
+++ b/beets/ui/commands.py
@@ -541,8 +541,8 @@ class ChangeRepresentation:
         cur_length0 = item.length if item.length else 0
         new_length0 = track_info.length if track_info.length else 0
         # format into string
-        cur_length = f"({ui.human_seconds_short(cur_length0)})"
-        new_length = f"({ui.human_seconds_short(new_length0)})"
+        cur_length = f"({util.human_seconds_short(cur_length0)})"
+        new_length = f"({util.human_seconds_short(new_length0)})"
         # colorize
         lhs_length = ui.colorize(highlight_color, cur_length)
         rhs_length = ui.colorize(highlight_color, new_length)
@@ -706,14 +706,14 @@ class AlbumChange(ChangeRepresentation):
         for track_info in self.match.extra_tracks:
             line = f" ! {track_info.title} (#{self.format_index(track_info)})"
             if track_info.length:
-                line += f" ({ui.human_seconds_short(track_info.length)})"
+                line += f" ({util.human_seconds_short(track_info.length)})"
             print_(ui.colorize("text_warning", line))
         if self.match.extra_items:
             print_(f"Unmatched tracks ({len(self.match.extra_items)}):")
         for item in self.match.extra_items:
             line = " ! {} (#{})".format(item.title, self.format_index(item))
             if item.length:
-                line += " ({})".format(ui.human_seconds_short(item.length))
+                line += " ({})".format(util.human_seconds_short(item.length))
             print_(ui.colorize("text_warning", line))
 
 
@@ -795,7 +795,7 @@ def summarize_items(items, singleton):
                 round(int(items[0].samplerate) / 1000, 1), items[0].bitdepth
             )
             summary_parts.append(sample_bits)
-        summary_parts.append(ui.human_seconds_short(total_duration))
+        summary_parts.append(util.human_seconds_short(total_duration))
         summary_parts.append(ui.human_bytes(total_filesize))
 
     return ", ".join(summary_parts)
diff --git a/beets/util/__init__.py b/beets/util/__init__.py
index 9bd7451f8..4572b27f9 100644
--- a/beets/util/__init__.py
+++ b/beets/util/__init__.py
@@ -1032,6 +1032,14 @@ def raw_seconds_short(string: str) -> float:
     return float(minutes * 60 + seconds)
 
 
+def human_seconds_short(interval):
+    """Formats a number of seconds as a short human-readable M:SS
+    string.
+    """
+    interval = int(interval)
+    return "%i:%02i" % (interval // 60, interval % 60)
+
+
 def asciify_path(path: str, sep_replace: str) -> str:
     """Decodes all unicode characters in a path into ASCII equivalents.
 
diff --git a/beetsplug/deezer.py b/beetsplug/deezer.py
index 2e5d8473a..89f7436f8 100644
--- a/beetsplug/deezer.py
+++ b/beetsplug/deezer.py
@@ -25,7 +25,6 @@ import unidecode
 from beets import ui
 from beets.autotag import AlbumInfo, TrackInfo
 from beets.dbcore import types
-from beets.library import DateType
 from beets.plugins import BeetsPlugin, MetadataSourcePlugin
 
 
@@ -35,7 +34,7 @@ class DeezerPlugin(MetadataSourcePlugin, BeetsPlugin):
     item_types = {
         "deezer_track_rank": types.INTEGER,
         "deezer_track_id": types.INTEGER,
-        "deezer_updated": DateType(),
+        "deezer_updated": types.DATE,
     }
 
     # Base URLs for the Deezer API
diff --git a/beetsplug/metasync/amarok.py b/beetsplug/metasync/amarok.py
index f8dcbe3f3..9afe6dbca 100644
--- a/beetsplug/metasync/amarok.py
+++ b/beetsplug/metasync/amarok.py
@@ -20,7 +20,6 @@ from time import mktime
 from xml.sax.saxutils import quoteattr
 
 from beets.dbcore import types
-from beets.library import DateType
 from beets.util import displayable_path
 from beetsplug.metasync import MetaSource
 
@@ -41,8 +40,8 @@ class Amarok(MetaSource):
         "amarok_score": types.FLOAT,
         "amarok_uid": types.STRING,
         "amarok_playcount": types.INTEGER,
-        "amarok_firstplayed": DateType(),
-        "amarok_lastplayed": DateType(),
+        "amarok_firstplayed": types.DATE,
+        "amarok_lastplayed": types.DATE,
     }
 
     query_xml = '<query version="1.0"> \
diff --git a/beetsplug/metasync/itunes.py b/beetsplug/metasync/itunes.py
index 02f592fdc..f777d0d55 100644
--- a/beetsplug/metasync/itunes.py
+++ b/beetsplug/metasync/itunes.py
@@ -26,7 +26,6 @@ from confuse import ConfigValueError
 
 from beets import util
 from beets.dbcore import types
-from beets.library import DateType
 from beets.util import bytestring_path, syspath
 from beetsplug.metasync import MetaSource
 
@@ -63,9 +62,9 @@ class Itunes(MetaSource):
         "itunes_rating": types.INTEGER,  # 0..100 scale
         "itunes_playcount": types.INTEGER,
         "itunes_skipcount": types.INTEGER,
-        "itunes_lastplayed": DateType(),
-        "itunes_lastskipped": DateType(),
-        "itunes_dateadded": DateType(),
+        "itunes_lastplayed": types.DATE,
+        "itunes_lastskipped": types.DATE,
+        "itunes_dateadded": types.DATE,
     }
 
     def __init__(self, config, log):
diff --git a/beetsplug/mpdstats.py b/beetsplug/mpdstats.py
index 6d4c269d1..20faf225f 100644
--- a/beetsplug/mpdstats.py
+++ b/beetsplug/mpdstats.py
@@ -18,8 +18,9 @@ import time
 
 import mpd
 
-from beets import config, library, plugins, ui
+from beets import config, plugins, ui
 from beets.dbcore import types
+from beets.dbcore.query import PathQuery
 from beets.util import displayable_path
 
 # If we lose the connection, how many times do we want to retry and how
@@ -160,7 +161,7 @@ class MPDStats:
 
     def get_item(self, path):
         """Return the beets item related to path."""
-        query = library.PathQuery("path", path)
+        query = PathQuery("path", path)
         item = self.lib.items(query).get()
         if item:
             return item
@@ -321,7 +322,7 @@ class MPDStatsPlugin(plugins.BeetsPlugin):
     item_types = {
         "play_count": types.INTEGER,
         "skip_count": types.INTEGER,
-        "last_played": library.DateType(),
+        "last_played": types.DATE,
         "rating": types.FLOAT,
     }
 
diff --git a/beetsplug/playlist.py b/beetsplug/playlist.py
index cf1d500e8..cb16fb5bc 100644
--- a/beetsplug/playlist.py
+++ b/beetsplug/playlist.py
@@ -18,8 +18,7 @@ import tempfile
 from collections.abc import Sequence
 
 import beets
-from beets.dbcore.query import InQuery
-from beets.library import BLOB_TYPE
+from beets.dbcore.query import BLOB_TYPE, InQuery
 from beets.util import path_as_posix
 
 
diff --git a/beetsplug/spotify.py b/beetsplug/spotify.py
index 76ceeed68..595da4892 100644
--- a/beetsplug/spotify.py
+++ b/beetsplug/spotify.py
@@ -34,10 +34,10 @@ import unidecode
 from beets import ui
 from beets.autotag.hooks import AlbumInfo, TrackInfo
 from beets.dbcore import types
-from beets.library import DateType, Library
 from beets.plugins import BeetsPlugin, MetadataSourcePlugin, Response
 
 if TYPE_CHECKING:
+    from beets.library import Library
     from beetsplug._typing import JSONDict
 
 DEFAULT_WAITING_TIME = 5
@@ -64,7 +64,7 @@ class SpotifyPlugin(MetadataSourcePlugin, BeetsPlugin):
         "spotify_tempo": types.FLOAT,
         "spotify_time_signature": types.INTEGER,
         "spotify_valence": types.FLOAT,
-        "spotify_updated": DateType(),
+        "spotify_updated": types.DATE,
     }
 
     # Base URLs for the Spotify API
diff --git a/beetsplug/types.py b/beetsplug/types.py
index 9ba3aac66..9bdfdecee 100644
--- a/beetsplug/types.py
+++ b/beetsplug/types.py
@@ -15,7 +15,6 @@
 
 from confuse import ConfigValueError
 
-from beets import library
 from beets.dbcore import types
 from beets.plugins import BeetsPlugin
 
@@ -42,7 +41,7 @@ class TypesPlugin(BeetsPlugin):
             elif value.get() == "bool":
                 mytypes[key] = types.BOOLEAN
             elif value.get() == "date":
-                mytypes[key] = library.DateType()
+                mytypes[key] = types.DATE
             else:
                 raise ConfigValueError(
                     "unknown type '{}' for the '{}' field".format(value, key)
diff --git a/beetsplug/web/__init__.py b/beetsplug/web/__init__.py
index 175cec4a9..c1b0b5029 100644
--- a/beetsplug/web/__init__.py
+++ b/beetsplug/web/__init__.py
@@ -25,6 +25,7 @@ from werkzeug.routing import BaseConverter, PathConverter
 
 import beets.library
 from beets import ui, util
+from beets.dbcore.query import PathQuery
 from beets.plugins import BeetsPlugin
 
 # Utilities.
@@ -342,7 +343,7 @@ def item_query(queries):
 
 @app.route("/item/path/<everything:path>")
 def item_at_path(path):
-    query = beets.library.PathQuery("path", path.encode("utf-8"))
+    query = PathQuery("path", path.encode("utf-8"))
     item = g.lib.items(query).get()
     if item:
         return flask.jsonify(_rep(item))
diff --git a/test/test_library.py b/test/test_library.py
index 36322cfec..2d232c88f 100644
--- a/test/test_library.py
+++ b/test/test_library.py
@@ -19,7 +19,6 @@ import os.path
 import re
 import shutil
 import stat
-import time
 import unicodedata
 import unittest
 from unittest.mock import patch
@@ -1320,56 +1319,3 @@ class ParseQueryTest(unittest.TestCase):
     def test_parse_bytes(self):
         with pytest.raises(AssertionError):
             beets.library.parse_query_string(b"query", None)
-
-
-class LibraryFieldTypesTest(unittest.TestCase):
-    """Test format() and parse() for library-specific field types"""
-
-    def test_datetype(self):
-        t = beets.library.DateType()
-
-        # format
-        time_format = beets.config["time_format"].as_str()
-        time_local = time.strftime(time_format, time.localtime(123456789))
-        assert time_local == t.format(123456789)
-        # parse
-        assert 123456789.0 == t.parse(time_local)
-        assert 123456789.0 == t.parse("123456789.0")
-        assert t.null == t.parse("not123456789.0")
-        assert t.null == t.parse("1973-11-29")
-
-    def test_pathtype(self):
-        t = beets.library.PathType()
-
-        # format
-        assert "/tmp" == t.format("/tmp")
-        assert "/tmp/\xe4lbum" == t.format("/tmp/\u00e4lbum")
-        # parse
-        assert np(b"/tmp") == t.parse("/tmp")
-        assert np(b"/tmp/\xc3\xa4lbum") == t.parse("/tmp/\u00e4lbum/")
-
-    def test_musicalkey(self):
-        t = beets.library.MusicalKey()
-
-        # parse
-        assert "C#m" == t.parse("c#m")
-        assert "Gm" == t.parse("g   minor")
-        assert "Not c#m" == t.parse("not C#m")
-
-    def test_durationtype(self):
-        t = beets.library.DurationType()
-
-        # format
-        assert "1:01" == t.format(61.23)
-        assert "60:01" == t.format(3601.23)
-        assert "0:00" == t.format(None)
-        # parse
-        assert 61.0 == t.parse("1:01")
-        assert 61.23 == t.parse("61.23")
-        assert 3601.0 == t.parse("60:01")
-        assert t.null == t.parse("1:00:01")
-        assert t.null == t.parse("not61.23")
-        # config format_raw_length
-        beets.config["format_raw_length"] = True
-        assert 61.23 == t.format(61.23)
-        assert 3601.23 == t.format(3601.23)
diff --git a/test/test_query.py b/test/test_query.py
index 22c2710de..6546cb4df 100644
--- a/test/test_query.py
+++ b/test/test_query.py
@@ -466,9 +466,9 @@ class PathQueryTest(ItemInDBTestCase, AssertsMixin):
         # Unadorned path queries with path separators in them are considered
         # path queries only when the path in question actually exists. So we
         # mock the existence check to return true.
-        beets.library.PathQuery.force_implicit_query_detection = True
+        beets.dbcore.query.PathQuery.force_implicit_query_detection = True
         yield
-        beets.library.PathQuery.force_implicit_query_detection = False
+        beets.dbcore.query.PathQuery.force_implicit_query_detection = False
 
     def test_path_exact_match(self):
         q = "path:/a/b/c.mp3"
@@ -609,7 +609,7 @@ class PathQueryTest(ItemInDBTestCase, AssertsMixin):
     def test_case_sensitivity(self):
         self.add_album(path=b"/A/B/C2.mp3", title="caps path")
 
-        makeq = partial(beets.library.PathQuery, "path", "/A/B")
+        makeq = partial(beets.dbcore.query.PathQuery, "path", "/A/B")
 
         results = self.lib.items(makeq(case_sensitive=True))
         self.assert_items_matched(results, ["caps path"])
@@ -621,7 +621,7 @@ class PathQueryTest(ItemInDBTestCase, AssertsMixin):
     # both os.sep and os.altsep
     @unittest.skipIf(sys.platform == "win32", "win32")
     def test_path_sep_detection(self):
-        is_path_query = beets.library.PathQuery.is_path_query
+        is_path_query = beets.dbcore.query.PathQuery.is_path_query
 
         with self.force_implicit_query_detection():
             assert is_path_query("/foo/bar")
@@ -641,7 +641,7 @@ class PathQueryTest(ItemInDBTestCase, AssertsMixin):
         Thus, don't use the `force_implicit_query_detection()`
         contextmanager which would disable the existence check.
         """
-        is_path_query = beets.library.PathQuery.is_path_query
+        is_path_query = beets.dbcore.query.PathQuery.is_path_query
 
         path = self.touch(os.path.join(b"foo", b"bar"))
         assert os.path.isabs(util.syspath(path))
@@ -664,7 +664,7 @@ class PathQueryTest(ItemInDBTestCase, AssertsMixin):
         Thus, don't use the `force_implicit_query_detection()`
         contextmanager which would disable the existence check.
         """
-        is_path_query = beets.library.PathQuery.is_path_query
+        is_path_query = beets.dbcore.query.PathQuery.is_path_query
 
         self.touch(os.path.join(b"foo", b"bar"))
 
diff --git a/test/test_types.py b/test/test_types.py
new file mode 100644
index 000000000..8a6acd0dc
--- /dev/null
+++ b/test/test_types.py
@@ -0,0 +1,59 @@
+import time
+import unittest
+
+import beets
+from beets.dbcore import types
+from beets.util import normpath
+
+
+class LibraryFieldTypesTest(unittest.TestCase):
+    """Test format() and parse() for library-specific field types"""
+
+    def test_datetype(self):
+        t = types.DATE
+
+        # format
+        time_format = beets.config["time_format"].as_str()
+        time_local = time.strftime(time_format, time.localtime(123456789))
+        assert time_local == t.format(123456789)
+        # parse
+        assert 123456789.0 == t.parse(time_local)
+        assert 123456789.0 == t.parse("123456789.0")
+        assert t.null == t.parse("not123456789.0")
+        assert t.null == t.parse("1973-11-29")
+
+    def test_pathtype(self):
+        t = types.PathType()
+
+        # format
+        assert "/tmp" == t.format("/tmp")
+        assert "/tmp/\xe4lbum" == t.format("/tmp/\u00e4lbum")
+        # parse
+        assert normpath(b"/tmp") == t.parse("/tmp")
+        assert normpath(b"/tmp/\xc3\xa4lbum") == t.parse("/tmp/\u00e4lbum/")
+
+    def test_musicalkey(self):
+        t = types.MusicalKey()
+
+        # parse
+        assert "C#m" == t.parse("c#m")
+        assert "Gm" == t.parse("g   minor")
+        assert "Not c#m" == t.parse("not C#m")
+
+    def test_durationtype(self):
+        t = types.DurationType()
+
+        # format
+        assert "1:01" == t.format(61.23)
+        assert "60:01" == t.format(3601.23)
+        assert "0:00" == t.format(None)
+        # parse
+        assert 61.0 == t.parse("1:01")
+        assert 61.23 == t.parse("61.23")
+        assert 3601.0 == t.parse("60:01")
+        assert t.null == t.parse("1:00:01")
+        assert t.null == t.parse("not61.23")
+        # config format_raw_length
+        beets.config["format_raw_length"] = True
+        assert 61.23 == t.format(61.23)
+        assert 3601.23 == t.format(3601.23)