diff --git a/src/file/drawing/anchor/anchor.spec.ts b/src/file/drawing/anchor/anchor.spec.ts
index 50b997bb7b..64e628546e 100644
--- a/src/file/drawing/anchor/anchor.spec.ts
+++ b/src/file/drawing/anchor/anchor.spec.ts
@@ -1,8 +1,6 @@
 import { assert, expect } from "chai";
-import { SinonStub, stub } from "sinon";
 
 import { Formatter } from "@export/formatter";
-import * as convenienceFunctions from "@util/convenience-functions";
 
 import { Utility } from "tests/utility";
 
@@ -458,7 +456,7 @@ describe("Anchor", () => {
                         "wp:docPr": {
                             _attr: {
                                 descr: "test",
-                                id: 0,
+                                id: 1,
                                 name: "test",
                                 title: "test",
                             },
diff --git a/src/file/drawing/drawing.spec.ts b/src/file/drawing/drawing.spec.ts
index fc9a35b4b4..c36f3e77ec 100644
--- a/src/file/drawing/drawing.spec.ts
+++ b/src/file/drawing/drawing.spec.ts
@@ -1,9 +1,7 @@
 import { expect } from "chai";
-import { SinonStub, stub } from "sinon";
 
 import { IContext } from "@file/xml-components";
 import { Formatter } from "@export/formatter";
-import * as convenienceFunctions from "@util/convenience-functions";
 
 import { ConcreteHyperlink, TextRun } from "../";
 import { Drawing, IDrawingOptions } from "./drawing";
@@ -70,7 +68,7 @@ describe("Drawing", () => {
                                 "wp:docPr": {
                                     _attr: {
                                         descr: "",
-                                        id: 0,
+                                        id: 1,
                                         name: "",
                                         title: "",
                                     },
@@ -301,7 +299,7 @@ describe("Drawing", () => {
                                 "wp:docPr": {
                                     _attr: {
                                         descr: "",
-                                        id: 0,
+                                        id: 1,
                                         name: "",
                                         title: "",
                                     },
@@ -535,7 +533,7 @@ describe("Drawing", () => {
                                     {
                                         _attr: {
                                             descr: "",
-                                            id: 0,
+                                            id: 1,
                                             name: "",
                                             title: "",
                                         },
diff --git a/src/file/numbering/numbering.spec.ts b/src/file/numbering/numbering.spec.ts
index 4af0286b07..a7013ef417 100644
--- a/src/file/numbering/numbering.spec.ts
+++ b/src/file/numbering/numbering.spec.ts
@@ -1,8 +1,6 @@
 import { expect } from "chai";
-import { SinonStub, stub } from "sinon";
 
 import { Formatter } from "@export/formatter";
-import * as convenienceFunctions from "@util/convenience-functions";
 
 import { Numbering } from "./numbering";
 
@@ -18,7 +16,7 @@ describe("Numbering", () => {
             const abstractNums = tree["w:numbering"].filter((el) => el["w:abstractNum"]);
             expect(abstractNums).to.have.lengthOf(1);
             expect(abstractNums[0]["w:abstractNum"]).to.deep.include.members([
-                { _attr: { "w:abstractNumId": 0, "w15:restartNumberingAfterBreak": 0 } },
+                { _attr: { "w:abstractNumId": 1, "w15:restartNumberingAfterBreak": 0 } },
                 { "w:multiLevelType": { _attr: { "w:val": "hybridMultilevel" } } },
             ]);
 
diff --git a/src/file/paragraph/run/image-run.spec.ts b/src/file/paragraph/run/image-run.spec.ts
index 47e947771a..2dc3cd2557 100644
--- a/src/file/paragraph/run/image-run.spec.ts
+++ b/src/file/paragraph/run/image-run.spec.ts
@@ -124,7 +124,7 @@ describe("ImageRun", () => {
                                         "wp:docPr": {
                                             _attr: {
                                                 descr: "",
-                                                id: 0,
+                                                id: 1,
                                                 name: "",
                                                 title: "",
                                             },
@@ -376,7 +376,7 @@ describe("ImageRun", () => {
                                         "wp:docPr": {
                                             _attr: {
                                                 descr: "",
-                                                id: 0,
+                                                id: 1,
                                                 name: "",
                                                 title: "",
                                             },
@@ -632,7 +632,7 @@ describe("ImageRun", () => {
                                         "wp:docPr": {
                                             _attr: {
                                                 descr: "",
-                                                id: 0,
+                                                id: 1,
                                                 name: "",
                                                 title: "",
                                             },
@@ -891,7 +891,7 @@ describe("ImageRun", () => {
                                         "wp:docPr": {
                                             _attr: {
                                                 descr: "",
-                                                id: 0,
+                                                id: 1,
                                                 name: "",
                                                 title: "",
                                             },
diff --git a/src/util/convenience-functions.ts b/src/util/convenience-functions.ts
index c866ab5064..b6683b0d15 100644
--- a/src/util/convenience-functions.ts
+++ b/src/util/convenience-functions.ts
@@ -5,15 +5,21 @@ export const convertMillimetersToTwip = (millimeters: number): number => Math.fl
 
 export const convertInchesToTwip = (inches: number): number => Math.floor(inches * 72 * 20);
 
-export const uniqueNumericIdCreator = (initial = 0): (() => number) => {
+export type UniqueNumericIdCreator = () => number;
+
+export const uniqueNumericIdCreator = (initial = 0): UniqueNumericIdCreator => {
     let currentCount = initial;
 
     return () => ++currentCount;
 };
 
-export const abstractNumUniqueNumericIdGen = () => uniqueNumericIdCreator();
-export const concreteNumUniqueNumericIdGen = () => uniqueNumericIdCreator(1); // Setting initial to 1 as we have numId = 1 for "default-bullet-numbering"
-export const docPropertiesUniqueNumericIdGen = () => uniqueNumericIdCreator();
-export const bookmarkUniqueNumericIdGen = () => uniqueNumericIdCreator();
+export const abstractNumUniqueNumericIdGen = (): UniqueNumericIdCreator => uniqueNumericIdCreator();
+
+// Setting initial to 1 as we have numId = 1 for "default-bullet-numbering"
+export const concreteNumUniqueNumericIdGen = (): UniqueNumericIdCreator => uniqueNumericIdCreator(1);
+
+export const docPropertiesUniqueNumericIdGen = (): UniqueNumericIdCreator => uniqueNumericIdCreator();
+
+export const bookmarkUniqueNumericIdGen = (): UniqueNumericIdCreator => uniqueNumericIdCreator();
 
 export const uniqueId = (): string => nanoid().toLowerCase();