diff --git a/test/Compiler-caching.test.js b/test/Compiler-caching.test.js
index 10aefabb4..9c3df9488 100644
--- a/test/Compiler-caching.test.js
+++ b/test/Compiler-caching.test.js
@@ -40,6 +40,9 @@ describe("Compiler (caching)", () => {
 				logs.writeFile.push(name, content);
 				files[name] = content.toString("utf-8");
 				callback();
+			},
+			stat(path, callback) {
+				callback(new Error("ENOENT"));
 			}
 		};
 		c.hooks.compilation.tap(
diff --git a/test/Compiler.test.js b/test/Compiler.test.js
index 73b8b9c4e..28e848bab 100644
--- a/test/Compiler.test.js
+++ b/test/Compiler.test.js
@@ -39,6 +39,9 @@ describe("Compiler", () => {
 				logs.writeFile.push(name, content);
 				files[name] = content.toString("utf-8");
 				callback();
+			},
+			stat(path, callback) {
+				callback(new Error("ENOENT"));
 			}
 		};
 		c.hooks.compilation.tap(