diff --git a/src/utils/errors/argument-error.ts b/src/utils/errors/argument-error.ts
index cf004a1..a3db965 100644
--- a/src/utils/errors/argument-error.ts
+++ b/src/utils/errors/argument-error.ts
@@ -54,12 +54,13 @@ export class ArgumentError extends Error {
      *
      * @param argument - The argument to check.
      * @param paramName - The name of the parameter being checked.
+     * @param message - The error message to display.
      *
      * @throws An {@link ArgumentError} if the specified argument is `null`, `undefined`, or empty.
      */
-    static throwIfNullOrEmpty(argument?: { length: number }, paramName?: string): void | never {
+    static throwIfNullOrEmpty(argument?: { length: number }, paramName?: string, message?: string): void | never {
         if (argument === undefined || argument === null || argument.length === 0) {
-            throw new ArgumentError(paramName, ArgumentError.EMPTY_ARGUMENT_ERROR_MESSAGE);
+            throw new ArgumentError(paramName, message || ArgumentError.EMPTY_ARGUMENT_ERROR_MESSAGE);
         }
     }
 
diff --git a/src/utils/errors/argument-null-error.ts b/src/utils/errors/argument-null-error.ts
index 086ec60..c36df1a 100644
--- a/src/utils/errors/argument-null-error.ts
+++ b/src/utils/errors/argument-null-error.ts
@@ -27,12 +27,13 @@ export class ArgumentNullError extends ArgumentError {
      *
      * @param argument - The argument to check.
      * @param paramName - The name of the parameter being checked.
+     * @param message - The error message to display.
      *
      * @throws An {@link ArgumentNullError} if the specified argument is `null` or `undefined`.
      */
-    static throwIfNull(argument?: unknown, paramName?: string): void | never {
+    static throwIfNull(argument?: unknown, paramName?: string, message?: string): void | never {
         if (argument === undefined || argument === null) {
-            throw new ArgumentNullError(paramName);
+            throw new ArgumentNullError(paramName, message);
         }
     }
 }
diff --git a/src/utils/errors/file-not-found-error.ts b/src/utils/errors/file-not-found-error.ts
index 8ec6a45..1e7c5fb 100644
--- a/src/utils/errors/file-not-found-error.ts
+++ b/src/utils/errors/file-not-found-error.ts
@@ -39,10 +39,11 @@ export class FileNotFoundError extends Error {
      * Throws a {@link FileNotFoundError} if the specified file does not exist.
      *
      * @param fileName - The name of the file to check for existence.
+     * @param message - The error message to display.
      */
-    static throwIfNotFound(fileName: PathLike): void | never {
+    static throwIfNotFound(fileName: PathLike, message?: string): void | never {
         if (!existsSync(fileName)) {
-            throw new FileNotFoundError(String(fileName));
+            throw new FileNotFoundError(String(fileName), message);
         }
     }
 }
diff --git a/tests/unit/utils/errors/argument-error.spec.ts b/tests/unit/utils/errors/argument-error.spec.ts
index 8bfa70f..b3f1793 100644
--- a/tests/unit/utils/errors/argument-error.spec.ts
+++ b/tests/unit/utils/errors/argument-error.spec.ts
@@ -38,6 +38,10 @@ describe("ArgumentError", () => {
             expect(() => ArgumentError.throwIfNullOrEmpty("", "param1")).toThrowError(new ArgumentError("param1", "The value cannot be null, undefined, or empty."));
         });
 
+        test("throws an ArgumentError with the provided error message", () => {
+            expect(() => ArgumentError.throwIfNullOrEmpty(null, "param1", "I don't like nulls.")).toThrowError(new ArgumentError("param1", "I don't like nulls."));
+        });
+
         test("does not throw if the argument is not null, undefined, or empty", () => {
             expect(() => ArgumentError.throwIfNullOrEmpty("not empty", "param1")).not.toThrow();
         });
diff --git a/tests/unit/utils/errors/argument-null-error.spec.ts b/tests/unit/utils/errors/argument-null-error.spec.ts
index 83a819a..1e54843 100644
--- a/tests/unit/utils/errors/argument-null-error.spec.ts
+++ b/tests/unit/utils/errors/argument-null-error.spec.ts
@@ -34,6 +34,10 @@ describe("ArgumentNullError", () => {
             expect(() => ArgumentNullError.throwIfNull(undefined, "param1")).toThrowError(new ArgumentNullError("param1"));
         });
 
+        test("throws an ArgumentNullError with the provided error message", () => {
+            expect(() => ArgumentNullError.throwIfNullOrEmpty(null, "param1", "I don't like nulls.")).toThrowError(new ArgumentNullError("param1", "I don't like nulls."));
+        });
+
         test("does not throw if the argument is not null or undefined", () => {
             expect(() => ArgumentNullError.throwIfNull("not null or undefined", "param1")).not.toThrow();
         });
diff --git a/tests/unit/utils/errors/file-not-found-error.spec.ts b/tests/unit/utils/errors/file-not-found-error.spec.ts
index 8cd177d..027866a 100644
--- a/tests/unit/utils/errors/file-not-found-error.spec.ts
+++ b/tests/unit/utils/errors/file-not-found-error.spec.ts
@@ -35,6 +35,10 @@ describe("FileNotFoundError", () => {
             expect(() => FileNotFoundError.throwIfNotFound("test.txt")).toThrow(FileNotFoundError);
         });
 
+        test("throws a FileNotFoundError with the provided error message", () => {
+            expect(() => FileNotFoundError.throwIfNotFound("test.txt", "I don't like file extensions.")).toThrowError(new FileNotFoundError("test.txt", "I don't like file extensions."));
+        });
+
         test("does not throw error if file exists", () => {
             expect(() => FileNotFoundError.throwIfNotFound("test")).not.toThrow();
         });