diff --git a/lib/entry-points.js b/lib/entry-points.js
index 6eee65e05..35a0b2092 100644
--- a/lib/entry-points.js
+++ b/lib/entry-points.js
@@ -145383,7 +145383,7 @@ var Failure = class {
 
 // src/actions-util.ts
 function getActionsEnv() {
-  return { getOptionalInput };
+  return { getRequiredInput, getOptionalInput };
 }
 var getRequiredInput = function(name) {
   const value = core3.getInput(name);
diff --git a/src/actions-util.ts b/src/actions-util.ts
index 5fd1ebc4f..6731f8ef4 100644
--- a/src/actions-util.ts
+++ b/src/actions-util.ts
@@ -27,6 +27,7 @@ declare const __CODEQL_ACTION_VERSION__: string;
  * global functions in tests.
  */
 export interface ActionsEnv {
+  getRequiredInput: (name: string) => string;
   getOptionalInput: (name: string) => string | undefined;
 }
 
@@ -34,7 +35,7 @@ export interface ActionsEnv {
  * Gets the real `ActionsEnv` used by production code.
  */
 export function getActionsEnv(): ActionsEnv {
-  return { getOptionalInput };
+  return { getRequiredInput, getOptionalInput };
 }
 
 /**
diff --git a/src/testing-utils.ts b/src/testing-utils.ts
index 03354653a..e4fb9adf6 100644
--- a/src/testing-utils.ts
+++ b/src/testing-utils.ts
@@ -187,6 +187,9 @@ export function getTestEnv(testEnv: NodeJS.ProcessEnv = {}): Env {
  */
 export function getTestActionsEnv(): ActionsEnv {
   return {
+    getRequiredInput: (name) => {
+      throw new Error(`Input required and not supplied: ${name}`);
+    },
     getOptionalInput: () => undefined,
   };
 }