diff --git a/ts/fixtures/lang/dyns/expected/ids.ts b/ts/fixtures/lang/dyns/expected/ids.ts
index c637605f5..5a0e3cee5 100644
--- a/ts/fixtures/lang/dyns/expected/ids.ts
+++ b/ts/fixtures/lang/dyns/expected/ids.ts
@@ -27,32 +27,32 @@ export function capped(id: rs.TypeId, cap: rs.usize): [rs.Result<undefined, rs.F
 
 /** `T`'s `TypeId`, through a type parameter. */
 export function idOf$Option_u8(): rs.TypeId {
-	return "3801bd64778907c7633cf473fe556a70";
+	return "<TypeId 1>";
 }
 
 /** `T`'s `TypeId`, through a type parameter. */
 export function idOf$u8(): rs.TypeId {
-	return "cfb1622e7734f8af272d8d182905dc25";
+	return "<TypeId 2>";
 }
 
 /** The `TypeId` of what `x` is, through a type parameter that may be a trait object. */
 export function idOfVal$dyn_Any(_1: Any.Any): rs.TypeId {
-	return "f48384178e2341267f2bcf8f82c035ac";
+	return "<TypeId 3>";
 }
 
 /** The `TypeId` of what `x` is, through a type parameter that may be a trait object. */
 export function idOfVal$dyn_ids_Marked(_1: Marked.Marked): rs.TypeId {
-	return "d356aeac368968f265dedab8a8d72ad8";
+	return "<TypeId 4>";
 }
 
 /** The `TypeId` of what `x` is, through a type parameter that may be a trait object. */
 export function idOfVal$ids_Mood(_1: Mood.Mood): rs.TypeId {
-	return "328e59b82c6cb0a6eb720af972265604";
+	return "<TypeId 5>";
 }
 
 /** The `TypeId` of what `x` is, through a type parameter that may be a trait object. */
 export function idOfVal$str(_1: string): rs.TypeId {
-	return "b7381ee5f3fdfc9d7fa709f37e151622";
+	return "<TypeId 6>";
 }
 
 /** The 128-bit hash `Debug` writes, if it writes `TypeId(0x…)` of 32 hex digits. */
@@ -116,8 +116,8 @@ export function ids(dataData: Uint8Array, dataStart: number, dataLen: number, ou
 			mood = "Calm" as Mood.Mood;
 		}
 		const byte: Byte.Byte = { _0: b };
-		const ids: rs.TypeId[] = ["cfb1622e7734f8af272d8d182905dc25", "79f19461b401588885a89e43144b08f1", "8f5d7517f5a241dab4213252fd0d53e8", "328e59b82c6cb0a6eb720af972265604", "24c161f26c70c1f1b9f602dc5fe9f65c", "b7381ee5f3fdfc9d7fa709f37e151622", "05fc01408e45e7cddf9e041e3391eafc", "3801bd64778907c7633cf473fe556a70", "513ce68a38c017b0c2e73410455cb3b0", "f48384178e2341267f2bcf8f82c035ac", "37a732caafaf8e089d3a9d4c07b2ec78", "d356aeac368968f265dedab8a8d72ad8", "25ff997ce0b3a76fb5ce30b55accc57f"];
-		const found: rs.TypeId[] = [idOf$u8(), "cfb1622e7734f8af272d8d182905dc25", "cfb1622e7734f8af272d8d182905dc25", "8f5d7517f5a241dab4213252fd0d53e8", "cfb1622e7734f8af272d8d182905dc25", "79f19461b401588885a89e43144b08f1", "8f5d7517f5a241dab4213252fd0d53e8", idOfVal$str("str"), idOfVal$ids_Mood(mood), idOfVal$dyn_Any(new of$u8(a)), idOf$Option_u8()];
+		const ids: rs.TypeId[] = ["<TypeId 2>", "<TypeId 7>", "<TypeId 8>", "<TypeId 5>", "<TypeId 9>", "<TypeId 6>", "<TypeId 10>", "<TypeId 1>", "<TypeId 11>", "<TypeId 3>", "<TypeId 12>", "<TypeId 4>", "<TypeId 13>"];
+		const found: rs.TypeId[] = [idOf$u8(), "<TypeId 2>", "<TypeId 2>", "<TypeId 8>", "<TypeId 2>", "<TypeId 7>", "<TypeId 8>", idOfVal$str("str"), idOfVal$ids_Mood(mood), idOfVal$dyn_Any(new of$u8(a)), idOf$Option_u8()];
 		const iter: rs.Iter<rs.TypeId> = rs.iterSlice(found);
 		while (true) {
 			const _53: rs.TypeId | rs.Done = iter.next();
@@ -131,7 +131,7 @@ export function ids(dataData: Uint8Array, dataStart: number, dataLen: number, ou
 			put(out, rs.fmtFormat([(f: rs.Formatter) => rs.fmtOption(part, f, rs.usizeDebug), " "]).v);
 		}
 		const part2 = rs.iterPosition(rs.iterSlice(ids), (i2: rs.TypeId): boolean => {
-			return i2 === "cfb1622e7734f8af272d8d182905dc25";
+			return i2 === "<TypeId 2>";
 		});
 		put(out, rs.fmtFormat([(f: rs.Formatter) => rs.fmtOption(part2, f, rs.usizeDebug), " "]).v);
 		const iter2: rs.Iter<Any.Any> = rs.iterSlice([new of$u8(a), new of$u32(n), new of$ids_Byte(byte), new of$ids_Mood(mood), new of$ref_str("str")]);
@@ -168,7 +168,7 @@ export function ids(dataData: Uint8Array, dataStart: number, dataLen: number, ou
 				return i5 === _165.typeId$Any();
 			});
 			const _187: boolean = _165.typeId$Any() === any.typeId$Any();
-			const _193: boolean = idOfVal$dyn_ids_Marked(_165) === "d356aeac368968f265dedab8a8d72ad8";
+			const _193: boolean = idOfVal$dyn_ids_Marked(_165) === "<TypeId 4>";
 			const args43 = [(f: rs.Formatter) => rs.u8Display(_178, f), (f: rs.Formatter) => rs.fmtOption(_180, f, rs.usizeDebug), (f: rs.Formatter) => rs.fmtBool(_187, f), (f: rs.Formatter) => rs.fmtBool(_193, f)];
 			put(out, rs.fmtFormat([args43[0], " ", args43[1], " ", args43[2], " ", args43[3], " "]).v);
 		}
@@ -189,16 +189,16 @@ export function ids(dataData: Uint8Array, dataStart: number, dataLen: number, ou
 			const _240: rs.usize | undefined = rs.iterPosition(rs.iterSlice(ids), (i6: rs.TypeId): boolean => {
 				return i6 === inner;
 			});
-			const _248: boolean = "37a732caafaf8e089d3a9d4c07b2ec78" === "37a732caafaf8e089d3a9d4c07b2ec78";
+			const _248: boolean = "<TypeId 12>" === "<TypeId 12>";
 			const args44 = [(f: rs.Formatter) => rs.fmtOption(_240, f, rs.usizeDebug), (f: rs.Formatter) => rs.fmtBool(_248, f)];
 			put(out, rs.fmtFormat([args44[0], " ", args44[1], " "]).v);
 		}
 		const _259: rs.Arc<Byte.Byte> = new rs.Arc(byte);
 		const shared: rs.Arc<Any.Any> = new rs.ArcDyn(_259, new of$ids_Byte(_259.value));
 		const boxed: Marked.Marked = new of$u8(a);
-		const _270: boolean = shared.value.typeId$Any() === "8f5d7517f5a241dab4213252fd0d53e8";
-		const _278: boolean = "6864f1ad0ca168ae5e502d6898f6f9c3" === "6864f1ad0ca168ae5e502d6898f6f9c3";
-		const _285: boolean = boxed.typeId$Any() === "cfb1622e7734f8af272d8d182905dc25";
+		const _270: boolean = shared.value.typeId$Any() === "<TypeId 8>";
+		const _278: boolean = "<TypeId 14>" === "<TypeId 14>";
+		const _285: boolean = boxed.typeId$Any() === "<TypeId 2>";
 		const args45 = [(f: rs.Formatter) => rs.fmtBool(_270, f), (f: rs.Formatter) => rs.fmtBool(_278, f), (f: rs.Formatter) => rs.fmtBool(_285, f)];
 		put(out, rs.fmtFormat([args45[0], " ", args45[1], " ", args45[2], " "]).v);
 		const _298: rs.Slice<rs.TypeId> = rs.sliceFrom(ids);
@@ -349,7 +349,7 @@ export function ids(dataData: Uint8Array, dataStart: number, dataLen: number, ou
 		const _580: rs.usize = rs.hashLen(hashed);
 		const args57 = [(f: rs.Formatter) => rs.fmtBool(ordered, f), (f: rs.Formatter) => rs.usizeDisplay(_577, f), (f: rs.Formatter) => rs.usizeDisplay(_580, f)];
 		put(out, rs.fmtFormat([args57[0], " ", args57[1], " ", args57[2], " "]).v);
-		const _590: rs.Iter<[rs.TypeId, string]> = rs.iterSlice([["cfb1622e7734f8af272d8d182905dc25", "u8"] as [rs.TypeId, string], ["8f5d7517f5a241dab4213252fd0d53e8", "byte"] as [rs.TypeId, string], ["328e59b82c6cb0a6eb720af972265604", "mood"] as [rs.TypeId, string]]);
+		const _590: rs.Iter<[rs.TypeId, string]> = rs.iterSlice([["<TypeId 2>", "u8"] as [rs.TypeId, string], ["<TypeId 8>", "byte"] as [rs.TypeId, string], ["<TypeId 5>", "mood"] as [rs.TypeId, string]]);
 		const names: rs.HashMap<rs.TypeId, string> = rs.hashExtend(rs.hashNew(rs.hashing(rs.typeIdHash, rs.same)) as rs.HashMap<rs.TypeId, string>, _590, undefined, undefined, undefined, 58720256);
 		for (const _603 of boxes.items) {
 			const part8 = rs.hashGet(names, _603.typeId$Any());
diff --git a/ts/fixtures/lang/dyns/expected/lib.ts b/ts/fixtures/lang/dyns/expected/lib.ts
index 28cc47b27..960fd3f8c 100644
--- a/ts/fixtures/lang/dyns/expected/lib.ts
+++ b/ts/fixtures/lang/dyns/expected/lib.ts
@@ -337,7 +337,7 @@ export class of$Option_u8 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "3801bd64778907c7633cf473fe556a70";
+		return "<TypeId 1>";
 	}
 }
 
@@ -583,7 +583,7 @@ export class of$dyns_Noisy {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "8abb48f5c9ad521e17c8b05ce0f1d679";
+		return "<TypeId 2>";
 	}
 }
 
@@ -659,7 +659,7 @@ export class of$dyns_Square {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "0ba6291209e997830eaef6cade61afd2";
+		return "<TypeId 3>";
 	}
 }
 
@@ -751,7 +751,7 @@ export class of$dyns_Tri {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "66772eb3554749a10355c03efd41f5ad";
+		return "<TypeId 4>";
 	}
 }
 
@@ -859,7 +859,7 @@ export class of$ids_Byte {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "8f5d7517f5a241dab4213252fd0d53e8";
+		return "<TypeId 5>";
 	}
 }
 
@@ -871,7 +871,7 @@ export class of$ids_Mood {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "328e59b82c6cb0a6eb720af972265604";
+		return "<TypeId 6>";
 	}
 }
 
@@ -887,7 +887,7 @@ export class of$ref_str {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "24c161f26c70c1f1b9f602dc5fe9f65c";
+		return "<TypeId 7>";
 	}
 }
 
@@ -1129,7 +1129,7 @@ export class of$tuple2_u8_u8 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "7d311253455a5117c9570c9455e07dcc";
+		return "<TypeId 8>";
 	}
 }
 
@@ -1205,7 +1205,7 @@ export class of$u32 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "79f19461b401588885a89e43144b08f1";
+		return "<TypeId 9>";
 	}
 }
 
@@ -1237,7 +1237,7 @@ export class of$u8 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "cfb1622e7734f8af272d8d182905dc25";
+		return "<TypeId 10>";
 	}
 }
 
@@ -1249,7 +1249,7 @@ export class of$unit {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "05fc01408e45e7cddf9e041e3391eafc";
+		return "<TypeId 11>";
 	}
 }
 
@@ -1261,7 +1261,7 @@ export class ofPlace$Option_u8 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "3801bd64778907c7633cf473fe556a70";
+		return "<TypeId 1>";
 	}
 }
 
@@ -1341,7 +1341,7 @@ export class ofPlace$dyns_Tri {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "66772eb3554749a10355c03efd41f5ad";
+		return "<TypeId 4>";
 	}
 }
 
@@ -1353,7 +1353,7 @@ export class ofPlace$ids_Mood {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "328e59b82c6cb0a6eb720af972265604";
+		return "<TypeId 6>";
 	}
 }
 
@@ -1423,7 +1423,7 @@ export class ofPlace$u32 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "79f19461b401588885a89e43144b08f1";
+		return "<TypeId 9>";
 	}
 }
 
@@ -1443,7 +1443,7 @@ export class ofPlace$u8 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "cfb1622e7734f8af272d8d182905dc25";
+		return "<TypeId 10>";
 	}
 }
 
@@ -1455,7 +1455,7 @@ export class ofPlace$unit {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "05fc01408e45e7cddf9e041e3391eafc";
+		return "<TypeId 11>";
 	}
 }
 
diff --git a/ts/fixtures/lang/panics/hook/expected/hooked.ts b/ts/fixtures/lang/panics/hook/expected/hooked.ts
index 8a2f337d4..c9e2b714f 100644
--- a/ts/fixtures/lang/panics/hook/expected/hooked.ts
+++ b/ts/fixtures/lang/panics/hook/expected/hooked.ts
@@ -20,7 +20,7 @@ import { withBorrow$097wfl1 } from "./std/thread/local.ts";
 export function record(info: rs.PanicHookInfo): void {
 	let kind!: rs.String;
 	const payload: Any.Any = rs.hookPayload(info, of$ref_str, of$String);
-	if (!(payload.typeId$Any() === "24c161f26c70c1f1b9f602dc5fe9f65c")) {
+	if (!(payload.typeId$Any() === "<TypeId 1>")) {
 		if (!(payload instanceof of$String)) {
 			const _12: rs.u32 | undefined = payload instanceof of$u32 ? payload.v : payload instanceof ofPlace$u32 ? payload.v.v : undefined;
 			if (_12 !== undefined) {
diff --git a/ts/fixtures/lang/panics/hook/expected/lib.ts b/ts/fixtures/lang/panics/hook/expected/lib.ts
index b72d52964..e5622da04 100644
--- a/ts/fixtures/lang/panics/hook/expected/lib.ts
+++ b/ts/fixtures/lang/panics/hook/expected/lib.ts
@@ -41,7 +41,7 @@ export class of$String {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "1430db79e63c4bb92bf94c26df7c977d";
+		return "<TypeId 1>";
 	}
 }
 
@@ -81,7 +81,7 @@ export class of$panics_Point {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "8e48006f0a085ab0ca68bcd6079f396f";
+		return "<TypeId 2>";
 	}
 }
 
@@ -93,7 +93,7 @@ export class of$ref_str {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "24c161f26c70c1f1b9f602dc5fe9f65c";
+		return "<TypeId 3>";
 	}
 }
 
@@ -105,7 +105,7 @@ export class of$u32 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "79f19461b401588885a89e43144b08f1";
+		return "<TypeId 4>";
 	}
 }
 
@@ -121,7 +121,7 @@ export class of$u8 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "cfb1622e7734f8af272d8d182905dc25";
+		return "<TypeId 5>";
 	}
 
 	via$Tracked(): rs.Location {
@@ -137,7 +137,7 @@ export class ofPlace$u32 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "79f19461b401588885a89e43144b08f1";
+		return "<TypeId 4>";
 	}
 }
 
@@ -149,7 +149,7 @@ export class ofPlace$u8 {
 	}
 
 	typeId$Any(): rs.TypeId {
-		return "cfb1622e7734f8af272d8d182905dc25";
+		return "<TypeId 5>";
 	}
 }
 
diff --git a/ts/tests/fixtures.rs b/ts/tests/fixtures.rs
index 0680ceeeb..392870e4f 100644
--- a/ts/tests/fixtures.rs
+++ b/ts/tests/fixtures.rs
@@ -114,7 +114,10 @@ fn sources(dir: &Path) -> Vec<(PathBuf, String)> {
 /// Compare the output with the fixture's `expected/` directory.
 fn snapshot(name: &str, out: &Path) {
 	let expected = fixture(name).join("expected");
-	let got = sources(out);
+	let got: Vec<_> = sources(out)
+		.into_iter()
+		.map(|(rel, text)| (rel, mask_type_ids(&text)))
+		.collect();
 	if std::env::var_os("UPDATE_EXPECT").is_some() {
 		let _ = std::fs::remove_dir_all(&expected);
 		for (rel, text) in &got {
@@ -141,6 +144,34 @@ fn snapshot(name: &str, out: &Path) {
 	}
 }
 
+/// `text` with each `TypeId`, a string literal of 32 hex digits, named by its first
+/// appearance: cargo hashes the host's profile into a crate's `-C metadata`, and so into
+/// the hash of every type it defines, which leaves only which ids are equal alike on
+/// every host.
+fn mask_type_ids(text: &str) -> String {
+	let mut seen: Vec<&str> = Vec::new();
+	let mut out = String::with_capacity(text.len());
+	let mut rest = text;
+	while let Some(at) = rest.find('"') {
+		out.push_str(&rest[..=at]);
+		rest = &rest[at + 1..];
+		let hash = rest
+			.get(..32)
+			.filter(|hash| hash.bytes().all(|b| matches!(b, b'0'..=b'9' | b'a'..=b'f')))
+			.filter(|_| rest[32..].starts_with('"'));
+		if let Some(hash) = hash {
+			let n = seen.iter().position(|seen| *seen == hash).unwrap_or_else(|| {
+				seen.push(hash);
+				seen.len() - 1
+			});
+			out.push_str(&format!("<TypeId {}>\"", n + 1));
+			rest = &rest[33..];
+		}
+	}
+	out.push_str(rest);
+	out
+}
+
 /// The first lines where two texts differ.
 fn diff(want: &str, got: &str) -> String {
 	let (want, got): (Vec<&str>, Vec<&str>) = (want.lines().collect(), got.lines().collect());