diff --git a/.gitignore b/.gitignore
index 3a1eff8c..98fb3364 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@
 /pkg/*/lib/
 /pkg/*/README.md.ts
 /pkg/*/test-fixture/tsconfig.json
+/pkg/*/tests/tsconfig.json
 /pkg/*/tsconfig.json
 /pnpm-debug.log
 /pnpm-lock.yaml
diff --git a/mk/make-pkg-tsconfig.mjs b/mk/make-pkg-tsconfig.mjs
index 7898a6b7..e95f5895 100644
--- a/mk/make-pkg-tsconfig.mjs
+++ b/mk/make-pkg-tsconfig.mjs
@@ -45,7 +45,8 @@ for (const filename of ["src/mod.ts", "src/main.ts"]) {
 
 await fs.writeFile("tsconfig.json", JSON.stringify(tsconfig, undefined, 2));
 
-const tsconfigTestFixture = {
+/** @type {typeof tsconfig} */
+const tsconfigTest = {
   extends: "../../../mk/tsconfig-base.json",
   compilerOptions: {
     rootDir: "..",
@@ -55,10 +56,12 @@ const tsconfigTestFixture = {
   ],
 };
 
-let hasTestFixture = false;
-try {
-  hasTestFixture = (await fs.stat("test-fixture")).isDirectory();
-} catch {}
-if (hasTestFixture) {
-  await fs.writeFile("test-fixture/tsconfig.json", JSON.stringify(tsconfigTestFixture, undefined, 2));
+for (const dir of ["test-fixture", "tests"]) {
+  let found = false;
+  try {
+    found = (await fs.stat(dir)).isDirectory();
+  } catch {}
+  if (found) {
+    await fs.writeFile(path.join(dir, "tsconfig.json"), JSON.stringify(tsconfigTest, undefined, 2));
+  }
 }
diff --git a/pkg/keychain/test-fixture/key-store.ts b/pkg/keychain/test-fixture/key-store.ts
index b92d61fa..28d0213d 100644
--- a/pkg/keychain/test-fixture/key-store.ts
+++ b/pkg/keychain/test-fixture/key-store.ts
@@ -50,7 +50,7 @@ export async function execute(keyChain: KeyChain, enabled: Enable = {}): Promise
   const keys1 = gen.map(([pvt]) => pvt.name).map(String);
 
   const keyNames2 = await keyChain.listKeys();
-  keyNames2.sort((a, b) => a.compare(b));
+  keyNames2.sort(Name.compare);
   const keys2 = (await Promise.all(keyNames2.map((n) => keyChain.getKey(n, "signer"))))
     .map((pvt) => pvt.name.toString());
 
@@ -59,7 +59,7 @@ export async function execute(keyChain: KeyChain, enabled: Enable = {}): Promise
       .map((u) => keyChain.deleteKey(new Name(u))),
   );
   const keyNames3 = await keyChain.listKeys();
-  keyNames3.sort((a, b) => a.compare(b));
+  keyNames3.sort(Name.compare);
   const keys3 = (await Promise.all(keyNames3.map((n) => keyChain.getKey(n, "verifier"))))
     .map((pub) => pub.name.toString());
 
diff --git a/pkg/packet/src/name/component.ts b/pkg/packet/src/name/component.ts
index f786c704..b1999d54 100644
--- a/pkg/packet/src/name/component.ts
+++ b/pkg/packet/src/name/component.ts
@@ -178,9 +178,7 @@ export class Component {
 
   /** Compare this component with other. */
   public compare(other: ComponentLike): Component.CompareResult {
-    other = Component.from(other);
-    return 2 * Math.sign(this.type - other.type || this.length - other.length ||
-      bufferCompare<Uint8Array>(this.value, other.value));
+    return Component.compare(this, Component.from(other));
   }
 
   /** Determine if this component equals other. */
@@ -199,4 +197,10 @@ export namespace Component {
     /** lhs is greater than rhs */
     GT = 2,
   }
+
+  /** Compare two components. */
+  export function compare(lhs: Component, rhs: Component): CompareResult {
+    return 2 * Math.sign(lhs.type - rhs.type || lhs.length - rhs.length ||
+      bufferCompare<Uint8Array>(lhs.value, rhs.value));
+  }
 }
diff --git a/pkg/packet/src/name/name.ts b/pkg/packet/src/name/name.ts
index 889dab8b..f3a21ab4 100644
--- a/pkg/packet/src/name/name.ts
+++ b/pkg/packet/src/name/name.ts
@@ -147,8 +147,8 @@ export class Name {
   public append(...args: unknown[]) {
     let suffix: readonly ComponentLike[];
     if (args.length === 2 &&
-        typeof (args[0] as NamingConvention<any>).create === "function") {
-      suffix = [(args[0] as NamingConvention<any>).create(args[1])];
+        typeof (args[0] as NamingConvention<unknown>).create === "function") {
+      suffix = [(args[0] as NamingConvention<unknown>).create(args[1])];
     } else {
       suffix = args as readonly ComponentLike[];
     }
@@ -157,27 +157,12 @@ export class Name {
 
   /** Return a copy of Name with i-th component replaced with `comp`. */
   public replaceAt(i: number, comp: ComponentLike): Name {
-    const comps: ComponentLike[] = [...this.comps];
-    comps.splice(i, 1, comp);
-    return new Name(comps);
+    return new Name((this.comps as readonly ComponentLike[]).toSpliced(i, 1, comp));
   }
 
   /** Compare with other name. */
   public compare(other: NameLike): Name.CompareResult {
-    other = Name.from(other);
-    const commonSize = Math.min(this.length, other.length);
-    const cmp = this.comparePrefix(other, commonSize);
-    if (cmp !== Name.CompareResult.EQUAL) {
-      return cmp;
-    }
-
-    if (this.length > commonSize) {
-      return Name.CompareResult.RPREFIX;
-    }
-    if (other.length > commonSize) {
-      return Name.CompareResult.LPREFIX;
-    }
-    return Name.CompareResult.EQUAL;
+    return Name.compare(this, Name.from(other));
   }
 
   /** Determine if this name equals other. */
@@ -186,23 +171,16 @@ export class Name {
     if (this.hex_ !== undefined && other.hex_ !== undefined) {
       return this.hex_ === other.hex_;
     }
-    return this.length === other.length && this.comparePrefix(other, this.length) === Name.CompareResult.EQUAL;
+    return this.length === other.length && comparePrefix(this, other, this.length) === Name.CompareResult.EQUAL;
   }
 
   /** Determine if this name is a prefix of other. */
   public isPrefixOf(other: NameLike): boolean {
     other = Name.from(other);
-    return this.length <= other.length && this.comparePrefix(other, this.length) === Name.CompareResult.EQUAL;
-  }
-
-  private comparePrefix(other: Name, n: number): Name.CompareResult {
-    for (let i = 0; i < n; ++i) {
-      const cmp = this.comps[i]!.compare(other.comps[i]!);
-      if (cmp !== Component.CompareResult.EQUAL) {
-        return cmp as unknown as Name.CompareResult;
-      }
+    if (this.hex_ !== undefined && other.hex_ !== undefined) {
+      return other.hex_.startsWith(this.hex_);
     }
-    return Name.CompareResult.EQUAL;
+    return this.length <= other.length && comparePrefix(this, other, this.length) === Name.CompareResult.EQUAL;
   }
 
   public encodeTo(encoder: Encoder) {
@@ -233,4 +211,32 @@ export namespace Name {
     /** rhs is less than, but not a prefix of lhs */
     GT = 2,
   }
+
+  /** Compare two names. */
+  export function compare(lhs: Name, rhs: Name): CompareResult {
+    const commonSize = Math.min(lhs.length, rhs.length);
+    const cmp = comparePrefix(lhs, rhs, commonSize);
+    if (cmp !== CompareResult.EQUAL) {
+      return cmp;
+    }
+
+    if (lhs.length > commonSize) {
+      return CompareResult.RPREFIX;
+    }
+    if (rhs.length > commonSize) {
+      return CompareResult.LPREFIX;
+    }
+    return CompareResult.EQUAL;
+  }
+}
+
+/** Compare first n components between two names. */
+function comparePrefix(lhs: Name, rhs: Name, n: number): Name.CompareResult {
+  for (let i = 0; i < n; ++i) {
+    const cmp = lhs.comps[i]!.compare(rhs.comps[i]!);
+    if (cmp !== Component.CompareResult.EQUAL) {
+      return cmp as unknown as Name.CompareResult;
+    }
+  }
+  return Name.CompareResult.EQUAL;
 }
diff --git a/pkg/trust-schema/tests/schema/pattern.t.ts b/pkg/trust-schema/tests/schema/pattern.t.ts
index ff2ed0bd..ed8c16b6 100644
--- a/pkg/trust-schema/tests/schema/pattern.t.ts
+++ b/pkg/trust-schema/tests/schema/pattern.t.ts
@@ -10,9 +10,7 @@ function match(p: P.Pattern, name: NameLike): P.Vars[] {
 }
 
 function build(p: P.Pattern, vars: P.VarsLike): Name[] {
-  const list = Array.from(p.build(vars));
-  list.sort((a, b) => a.compare(b));
-  return list;
+  return Array.from(p.build(vars)).toSorted(Name.compare);
 }
 
 test("const variable concat", () => {