diff --git a/packages/codemods/src/__test__/method-codemods.test.js b/packages/codemods/src/__test__/method-codemods.test.js
index fba45ae0..7d0175d3 100644
--- a/packages/codemods/src/__test__/method-codemods.test.js
+++ b/packages/codemods/src/__test__/method-codemods.test.js
@@ -144,14 +144,21 @@ fetchMock.unmockGlobal();`,
 		});
 	});
 
-	describe('converting lastCall()', () => {
-		it('single .lastUrl()', () => {
+	describe('warning about CallLog', () => {
+		it('lastCall()', () => {
 			expectCodemodResult(
 				'fetchMock.lastCall()',
 				`throw new Error("lastCall() now returns a CallLog object instead of an array. Refer to the documentation")
 fetchMock.lastCall()`,
 			);
 		});
+		it('calls()', () => {
+			expectCodemodResult(
+				'fetchMock.calls()',
+				`throw new Error("calls() now returns an array of CallLog objects instead of an array of arrays. Refer to the documentation")
+fetchMock.calls()`,
+			);
+		});
 	});
 
 	describe('converting lastOptions()', () => {
@@ -244,6 +251,4 @@ fetchMock.lastCall()`,
 	});
 
 	// .sandbox() => .fetchHandler(and maybe a comment about.createInstance())
-	// lastCall() => try to change uses of this to expect a callLog, but probably just insert a commemnt / error
-	// calls() => add error
 });
diff --git a/packages/codemods/src/codemods/methods.js b/packages/codemods/src/codemods/methods.js
index 14926ee2..b52695f6 100644
--- a/packages/codemods/src/codemods/methods.js
+++ b/packages/codemods/src/codemods/methods.js
@@ -136,4 +136,25 @@ fetchMock.unmockGlobal();
 				.find(j.ThrowStatement)
 				.get().value,
 		);
+
+	root
+		.find(j.CallExpression, {
+			callee: {
+				object: {
+					type: 'Identifier',
+					name: fetchMockVariableName,
+				},
+				property: {
+					name: 'calls',
+				},
+			},
+		})
+		.closest(j.ExpressionStatement)
+		.insertBefore(
+			j(
+				'throw new Error("calls() now returns an array of CallLog objects instead of an array of arrays. Refer to the documentation")',
+			)
+				.find(j.ThrowStatement)
+				.get().value,
+		);
 }