diff --git a/src/slash-commands/events.command.test.ts b/src/slash-commands/events.command.test.ts
new file mode 100644
index 0000000..6b706a8
--- /dev/null
+++ b/src/slash-commands/events.command.test.ts
@@ -0,0 +1,215 @@
+import { describe, expect, it, vi } from "vitest";
+
+import { createMockInteraction } from "../test/mocks/discord.mock";
+import eventsSlashCommand from "./events.command";
+
+vi.mock("../config/constants", async (importOriginal) => {
+  const actual = (await importOriginal()) as Record<string, unknown>;
+
+  return { ...actual, GAMBLER_ROLE_ID: "gambler-role-id" };
+});
+
+function createMockMember(name: string, overrides?: Record<string, unknown>) {
+  return {
+    nickname: name,
+    displayName: name,
+    id: `id-${name}`,
+    roles: { remove: vi.fn(), add: vi.fn() },
+    ...overrides,
+  };
+}
+
+// role.members is a Collection that filters from the guild cache.
+// We simulate it with an object whose values() returns an iterator with toArray().
+function createMembersProxy(members: ReturnType<typeof createMockMember>[]) {
+  return {
+    values: () => ({
+      toArray: () => members,
+    }),
+  };
+}
+
+function createMockRole(members: ReturnType<typeof createMockMember>[]) {
+  return {
+    id: "gambler-role-id",
+    members: createMembersProxy(members),
+  };
+}
+
+function createMockGuild(role: ReturnType<typeof createMockRole>) {
+  return {
+    id: "222222222",
+    roles: { fetch: vi.fn().mockResolvedValue(role) },
+    members: { fetch: vi.fn().mockResolvedValue(undefined) },
+  };
+}
+
+describe("SlashCommand: events", () => {
+  describe("gambler reset", () => {
+    it("fetches guild members before reading role.members to avoid stale cache", async () => {
+      // ARRANGE
+      const memberA = createMockMember("Alice");
+      const memberB = createMockMember("Bob");
+      const role = createMockRole([]);
+
+      const guild = createMockGuild(role);
+
+      // Simulate the real behavior: role.members is stale until guild.members.fetch()
+      // refreshes the cache, at which point role.members reflects the actual state.
+      guild.members.fetch.mockImplementation(async () => {
+        (role as any).members = createMembersProxy([memberA, memberB]);
+      });
+
+      const interaction = createMockInteraction({
+        commandName: "events",
+        guild,
+        options: {
+          getSubcommandGroup: vi.fn(() => "gambler"),
+          getSubcommand: vi.fn(() => "reset"),
+        },
+      });
+
+      // ACT
+      await eventsSlashCommand.execute(interaction, null as any);
+
+      // ASSERT
+      expect(guild.members.fetch).toHaveBeenCalled();
+      expect(memberA.roles.remove).toHaveBeenCalledWith(role);
+      expect(memberB.roles.remove).toHaveBeenCalledWith(role);
+      expect(interaction.editReply).toHaveBeenCalledWith(
+        expect.objectContaining({
+          content: "Removed Gambler role from 2 user(s).",
+        }),
+      );
+    });
+
+    it("reports zero removals when no members have the role", async () => {
+      // ARRANGE
+      const role = createMockRole([]);
+      const guild = createMockGuild(role);
+
+      const interaction = createMockInteraction({
+        commandName: "events",
+        guild,
+        options: {
+          getSubcommandGroup: vi.fn(() => "gambler"),
+          getSubcommand: vi.fn(() => "reset"),
+        },
+      });
+
+      // ACT
+      await eventsSlashCommand.execute(interaction, null as any);
+
+      // ASSERT
+      expect(guild.members.fetch).toHaveBeenCalled();
+      expect(interaction.editReply).toHaveBeenCalledWith("Removed Gambler role from 0 user(s).");
+    });
+
+    it("uses nickname over displayName when available", async () => {
+      // ARRANGE
+      const member = createMockMember("DisplayName", { nickname: "Nickname" });
+      const role = createMockRole([]);
+      const guild = createMockGuild(role);
+
+      guild.members.fetch.mockImplementation(async () => {
+        (role as any).members = createMembersProxy([member]);
+      });
+
+      const interaction = createMockInteraction({
+        commandName: "events",
+        guild,
+        options: {
+          getSubcommandGroup: vi.fn(() => "gambler"),
+          getSubcommand: vi.fn(() => "reset"),
+        },
+      });
+
+      // ACT
+      await eventsSlashCommand.execute(interaction, null as any);
+
+      // ASSERT
+      const editReplyCall = (interaction.editReply as any).mock.calls[0][0];
+      const logFile = editReplyCall.files[0];
+      const logContent = logFile.attachment.toString("utf8");
+      expect(logContent).toEqual("Nickname");
+    });
+  });
+
+  describe("gambler award", () => {
+    it("awards the gambler role to the specified user", async () => {
+      // ARRANGE
+      const targetUser = { id: "target-user-id" };
+      const targetMember = createMockMember("TargetUser");
+      const role = createMockRole([]);
+      const guild = createMockGuild(role);
+
+      guild.members.fetch.mockResolvedValue(targetMember);
+
+      const interaction = createMockInteraction({
+        commandName: "events",
+        guild,
+        options: {
+          getSubcommandGroup: vi.fn(() => "gambler"),
+          getSubcommand: vi.fn(() => "award"),
+          getUser: vi.fn(() => targetUser),
+        },
+      });
+
+      // ACT
+      await eventsSlashCommand.execute(interaction, null as any);
+
+      // ASSERT
+      expect(targetMember.roles.add).toHaveBeenCalledWith(role);
+      expect(interaction.editReply).toHaveBeenCalledWith({
+        content: `Successfully awarded the Gambler role to <@${targetMember.id}>`,
+        allowedMentions: { parse: [] },
+      });
+    });
+  });
+
+  describe("error handling", () => {
+    it("replies with an error when the gambler role cannot be fetched", async () => {
+      // ARRANGE
+      const role = createMockRole([]);
+      const guild = createMockGuild(role);
+      guild.roles.fetch.mockResolvedValue(null);
+
+      const interaction = createMockInteraction({
+        commandName: "events",
+        guild,
+        options: {
+          getSubcommandGroup: vi.fn(() => "gambler"),
+          getSubcommand: vi.fn(() => "reset"),
+        },
+      });
+
+      // ACT
+      await eventsSlashCommand.execute(interaction, null as any);
+
+      // ASSERT
+      expect(interaction.editReply).toHaveBeenCalledWith(
+        "Sorry, I couldn't fetch the Gambler role. Please contact an admin.",
+      );
+    });
+
+    it("replies with an error when used outside a guild", async () => {
+      // ARRANGE
+      const interaction = createMockInteraction({
+        commandName: "events",
+        guild: null,
+        options: {
+          getSubcommandGroup: vi.fn(() => "gambler"),
+          getSubcommand: vi.fn(() => "reset"),
+        },
+      });
+
+      // ACT
+      await eventsSlashCommand.execute(interaction, null as any);
+
+      // ASSERT
+      expect(interaction.editReply).toHaveBeenCalledWith(
+        "This command is only supported in a server context.",
+      );
+    });
+  });
+});