diff --git a/tests/buttonEvents/Effects.test.ts b/tests/buttonEvents/Effects.test.ts
index 6c7bd97..26f172c 100644
--- a/tests/buttonEvents/Effects.test.ts
+++ b/tests/buttonEvents/Effects.test.ts
@@ -1,25 +1,127 @@
+import {ButtonInteraction} from "discord.js";
+import Effects from "../../src/buttonEvents/Effects";
+import EffectHelper from "../../src/helpers/EffectHelper";
+
 describe("execute", () => {
     describe("GIVEN action in custom id is list", () => {
-        test.todo("EXPECT list function to be called");
+        let interaction = {
+            customId: "effects list",
+        } as unknown as ButtonInteraction;
+
+        let listSpy: any;
+
+        beforeAll(async () => {
+            const effects = new Effects();
+
+            listSpy = jest.spyOn(effects as any, "List")
+                .mockImplementation(() => {});
+
+            await effects.execute(interaction);
+        });
+
+        test("EXPECT list function to be called", () => {
+            expect(listSpy).toHaveBeenCalledTimes(1);
+            expect(listSpy).toHaveBeenCalledWith(interaction);
+        });
     });
 });
 
 describe("List", () => {
-    describe("GIVEN page is a valid number", () => {
-        test.todo("EXPECT EffectHelper.GenerateEffectEmbed to be called");
+    let interaction: any;
 
-        test.todo("EXPECT interaction to be updated");
+    const embed = {
+        name: "Embed",
+    };
+
+    const row = {
+        name: "Row",
+    };
+
+    beforeEach(() => {
+        interaction = {
+            customId: "effects list",
+            user: {
+                id: "userId",
+            },
+            update: jest.fn(),
+            reply: jest.fn(),
+        };
+    });
+
+    describe("GIVEN page is a valid number", () => {
+        beforeEach(async () => {
+            interaction.customId += " 1";
+
+            EffectHelper.GenerateEffectEmbed = jest.fn()
+                .mockResolvedValue({
+                    embed,
+                    row,
+                });
+
+            const effects = new Effects();
+
+            await effects.execute(interaction);
+        });
+
+        test("EXPECT EffectHelper.GenerateEffectEmbed to be called", () => {
+            expect(EffectHelper.GenerateEffectEmbed).toHaveBeenCalledTimes(1);
+            expect(EffectHelper.GenerateEffectEmbed).toHaveBeenCalledWith("userId", 1);
+        });
+
+        test("EXPECT interaction to be updated", () => {
+            expect(interaction.update).toHaveBeenCalledTimes(1);
+            expect(interaction.update).toHaveBeenCalledWith({
+                embeds: [ embed ],
+                components: [ row ],
+            });
+        });
     });
 
     describe("GIVEN page in custom id is not supplied", () => {
-        test.todo("EXPECT interaction to be replied with error");
+        beforeEach(async () => {
+            EffectHelper.GenerateEffectEmbed = jest.fn()
+                .mockResolvedValue({
+                    embed,
+                    row,
+                });
 
-        test.todo("EXPECT interaction to not be updated");
+            const effects = new Effects();
+
+            await effects.execute(interaction);
+        });
+
+        test("EXPECT interaction to be replied with error", () => {
+            expect(interaction.reply).toHaveBeenCalledTimes(1);
+            expect(interaction.reply).toHaveBeenCalledWith("Page option is not a valid number");
+        });
+
+        test("EXPECT interaction to not be updated", () => {
+            expect(interaction.update).not.toHaveBeenCalled();
+        });
     });
 
     describe("GIVEN page in custom id is not a number", () => {
-        test.todo("EXPECT interaction to be replied with error");
+        beforeEach(async () => {
+            interaction.customId += " test";
 
-        test.todo("EXPECT interaction to not be updated");
+            EffectHelper.GenerateEffectEmbed = jest.fn()
+                .mockResolvedValue({
+                    embed,
+                    row,
+                });
+
+            const effects = new Effects();
+
+            await effects.execute(interaction);
+        });
+
+        test("EXPECT interaction to be replied with error", () => {
+            expect(interaction.reply).toHaveBeenCalledTimes(1);
+            expect(interaction.reply).toHaveBeenCalledWith("Page option is not a valid number");
+        });
+
+        test("EXPECT interaction to not be updated", () => {
+            expect(interaction.update).not.toHaveBeenCalled();
+        });
     });
 });
diff --git a/tests/commands/__snapshots__/effects.test.ts.snap b/tests/commands/__snapshots__/effects.test.ts.snap
new file mode 100644
index 0000000..ede2091
--- /dev/null
+++ b/tests/commands/__snapshots__/effects.test.ts.snap
@@ -0,0 +1,40 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`constructor EXPECT CommandBuilder to be defined 1`] = `
+{
+  "contexts": undefined,
+  "default_member_permissions": undefined,
+  "default_permission": undefined,
+  "description": "Effects",
+  "description_localizations": undefined,
+  "dm_permission": undefined,
+  "integration_types": undefined,
+  "name": "effects",
+  "name_localizations": undefined,
+  "nsfw": undefined,
+  "options": [
+    {
+      "description": "List all effects I have",
+      "description_localizations": undefined,
+      "name": "list",
+      "name_localizations": undefined,
+      "options": [
+        {
+          "autocomplete": undefined,
+          "choices": undefined,
+          "description": "The page number",
+          "description_localizations": undefined,
+          "max_value": undefined,
+          "min_value": 1,
+          "name": "page",
+          "name_localizations": undefined,
+          "required": false,
+          "type": 10,
+        },
+      ],
+      "type": 1,
+    },
+  ],
+  "type": 1,
+}
+`;
diff --git a/tests/commands/effects.test.ts b/tests/commands/effects.test.ts
index f2c14ce..0ab6eab 100644
--- a/tests/commands/effects.test.ts
+++ b/tests/commands/effects.test.ts
@@ -1,10 +1,42 @@
+import Effects from "../../src/commands/effects";
+
 describe("constructor", () => {
-    test.todo("EXPECT CommandBuilder to be defined");
+    let effects: Effects;
+
+    beforeEach(() => {
+        effects = new Effects();
+    });
+
+    test("EXPECT CommandBuilder to be defined", () => {
+        expect(effects.CommandBuilder).toMatchSnapshot();
+    });
 });
 
 describe("execute", () => {
     describe("GIVEN interaction is not a chat input command", () => {
-        test.todo("EXPECT nothing to happen");
+        let interaction: any;
+
+        let listSpy: any;
+
+        beforeEach(async () => {
+            interaction = {
+                isChatInputCommand: jest.fn().mockReturnValue(false),
+            };
+
+            const effects = new Effects();
+
+            listSpy = jest.spyOn(effects as any, "List");
+
+            await effects.execute(interaction);
+        });
+
+        test("EXPECT isChatInputCommand to have been called", () => {
+            expect(interaction.isChatInputCommand).toHaveBeenCalledTimes(1);
+        });
+
+        test("EXPECT nothing to happen", () => {
+            expect(listSpy).not.toHaveBeenCalled();
+        });
     });
 
     describe("GIVEN subcommand is list", () => {