diff --git a/src/discord/targets.test.ts b/src/discord/targets.test.ts
index e30b6a69bef..d3d4d3935ec 100644
--- a/src/discord/targets.test.ts
+++ b/src/discord/targets.test.ts
@@ -10,43 +10,33 @@ vi.mock("./directory-live.js", () => ({
 
 describe("parseDiscordTarget", () => {
   it("parses user mention and prefixes", () => {
-    expect(parseDiscordTarget("<@123>")).toMatchObject({
-      kind: "user",
-      id: "123",
-      normalized: "user:123",
-    });
-    expect(parseDiscordTarget("<@!456>")).toMatchObject({
-      kind: "user",
-      id: "456",
-      normalized: "user:456",
-    });
-    expect(parseDiscordTarget("user:789")).toMatchObject({
-      kind: "user",
-      id: "789",
-      normalized: "user:789",
-    });
-    expect(parseDiscordTarget("discord:987")).toMatchObject({
-      kind: "user",
-      id: "987",
-      normalized: "user:987",
-    });
+    const cases = [
+      { input: "<@123>", id: "123", normalized: "user:123" },
+      { input: "<@!456>", id: "456", normalized: "user:456" },
+      { input: "user:789", id: "789", normalized: "user:789" },
+      { input: "discord:987", id: "987", normalized: "user:987" },
+    ] as const;
+    for (const testCase of cases) {
+      expect(parseDiscordTarget(testCase.input), testCase.input).toMatchObject({
+        kind: "user",
+        id: testCase.id,
+        normalized: testCase.normalized,
+      });
+    }
   });
 
   it("parses channel targets", () => {
-    expect(parseDiscordTarget("channel:555")).toMatchObject({
-      kind: "channel",
-      id: "555",
-      normalized: "channel:555",
-    });
-    expect(parseDiscordTarget("general")).toMatchObject({
-      kind: "channel",
-      id: "general",
-      normalized: "channel:general",
-    });
-  });
-
-  it("rejects ambiguous numeric ids without a default kind", () => {
-    expect(() => parseDiscordTarget("123")).toThrow(/Ambiguous Discord recipient/);
+    const cases = [
+      { input: "channel:555", id: "555", normalized: "channel:555" },
+      { input: "general", id: "general", normalized: "channel:general" },
+    ] as const;
+    for (const testCase of cases) {
+      expect(parseDiscordTarget(testCase.input), testCase.input).toMatchObject({
+        kind: "channel",
+        id: testCase.id,
+        normalized: testCase.normalized,
+      });
+    }
   });
 
   it("accepts numeric ids when a default kind is provided", () => {
@@ -57,8 +47,16 @@ describe("parseDiscordTarget", () => {
     });
   });
 
-  it("rejects non-numeric @ mentions", () => {
-    expect(() => parseDiscordTarget("@bob")).toThrow(/Discord DMs require a user id/);
+  it("rejects invalid parse targets", () => {
+    const cases = [
+      { input: "123", expectedMessage: /Ambiguous Discord recipient/ },
+      { input: "@bob", expectedMessage: /Discord DMs require a user id/ },
+    ] as const;
+    for (const testCase of cases) {
+      expect(() => parseDiscordTarget(testCase.input), testCase.input).toThrow(
+        testCase.expectedMessage,
+      );
+    }
   });
 });
 
diff --git a/src/slack/targets.test.ts b/src/slack/targets.test.ts
index a15906884cb..5b56a5bd0da 100644
--- a/src/slack/targets.test.ts
+++ b/src/slack/targets.test.ts
@@ -4,39 +4,44 @@ import { parseSlackTarget, resolveSlackChannelId } from "./targets.js";
 
 describe("parseSlackTarget", () => {
   it("parses user mentions and prefixes", () => {
-    expect(parseSlackTarget("<@U123>")).toMatchObject({
-      kind: "user",
-      id: "U123",
-      normalized: "user:u123",
-    });
-    expect(parseSlackTarget("user:U456")).toMatchObject({
-      kind: "user",
-      id: "U456",
-      normalized: "user:u456",
-    });
-    expect(parseSlackTarget("slack:U789")).toMatchObject({
-      kind: "user",
-      id: "U789",
-      normalized: "user:u789",
-    });
+    const cases = [
+      { input: "<@U123>", id: "U123", normalized: "user:u123" },
+      { input: "user:U456", id: "U456", normalized: "user:u456" },
+      { input: "slack:U789", id: "U789", normalized: "user:u789" },
+    ] as const;
+    for (const testCase of cases) {
+      expect(parseSlackTarget(testCase.input), testCase.input).toMatchObject({
+        kind: "user",
+        id: testCase.id,
+        normalized: testCase.normalized,
+      });
+    }
   });
 
   it("parses channel targets", () => {
-    expect(parseSlackTarget("channel:C123")).toMatchObject({
-      kind: "channel",
-      id: "C123",
-      normalized: "channel:c123",
-    });
-    expect(parseSlackTarget("#C999")).toMatchObject({
-      kind: "channel",
-      id: "C999",
-      normalized: "channel:c999",
-    });
+    const cases = [
+      { input: "channel:C123", id: "C123", normalized: "channel:c123" },
+      { input: "#C999", id: "C999", normalized: "channel:c999" },
+    ] as const;
+    for (const testCase of cases) {
+      expect(parseSlackTarget(testCase.input), testCase.input).toMatchObject({
+        kind: "channel",
+        id: testCase.id,
+        normalized: testCase.normalized,
+      });
+    }
   });
 
   it("rejects invalid @ and # targets", () => {
-    expect(() => parseSlackTarget("@bob-1")).toThrow(/Slack DMs require a user id/);
-    expect(() => parseSlackTarget("#general-1")).toThrow(/Slack channels require a channel id/);
+    const cases = [
+      { input: "@bob-1", expectedMessage: /Slack DMs require a user id/ },
+      { input: "#general-1", expectedMessage: /Slack channels require a channel id/ },
+    ] as const;
+    for (const testCase of cases) {
+      expect(() => parseSlackTarget(testCase.input), testCase.input).toThrow(
+        testCase.expectedMessage,
+      );
+    }
   });
 });