diff --git a/mockgen/internal/tests/aux_imports_embedded_interface/bugreport_mock.go b/mockgen/internal/tests/aux_imports_embedded_interface/bugreport_mock.go
index e5326c80..26a80d65 100644
--- a/mockgen/internal/tests/aux_imports_embedded_interface/bugreport_mock.go
+++ b/mockgen/internal/tests/aux_imports_embedded_interface/bugreport_mock.go
@@ -34,20 +34,6 @@ func (m *MockSource) EXPECT() *MockSourceMockRecorder {
 	return m.recorder
 }
 
-// Method mocks base method.
-func (m *MockSource) Method() faux.Return {
-	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "Method")
-	ret0, _ := ret[0].(faux.Return)
-	return ret0
-}
-
-// Method indicates an expected call of Method.
-func (mr *MockSourceMockRecorder) Method() *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Method", reflect.TypeOf((*MockSource)(nil).Method))
-}
-
 // Error mocks base method.
 func (m *MockSource) Error() string {
 	m.ctrl.T.Helper()
@@ -61,3 +47,17 @@ func (mr *MockSourceMockRecorder) Error() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Error", reflect.TypeOf((*MockSource)(nil).Error))
 }
+
+// Method mocks base method.
+func (m *MockSource) Method() faux.Return {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Method")
+	ret0, _ := ret[0].(faux.Return)
+	return ret0
+}
+
+// Method indicates an expected call of Method.
+func (mr *MockSourceMockRecorder) Method() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Method", reflect.TypeOf((*MockSource)(nil).Method))
+}
diff --git a/mockgen/internal/tests/import_embedded_interface/bugreport_mock.go b/mockgen/internal/tests/import_embedded_interface/bugreport_mock.go
index 4cc17e95..b5b7be3c 100644
--- a/mockgen/internal/tests/import_embedded_interface/bugreport_mock.go
+++ b/mockgen/internal/tests/import_embedded_interface/bugreport_mock.go
@@ -35,6 +35,20 @@ func (m *MockSource) EXPECT() *MockSourceMockRecorder {
 	return m.recorder
 }
 
+// Error mocks base method.
+func (m *MockSource) Error() string {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Error")
+	ret0, _ := ret[0].(string)
+	return ret0
+}
+
+// Error indicates an expected call of Error.
+func (mr *MockSourceMockRecorder) Error() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Error", reflect.TypeOf((*MockSource)(nil).Error))
+}
+
 // Ersatz mocks base method.
 func (m *MockSource) Ersatz() ersatz.Return {
 	m.ctrl.T.Helper()
@@ -62,17 +76,3 @@ func (mr *MockSourceMockRecorder) OtherErsatz() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "OtherErsatz", reflect.TypeOf((*MockSource)(nil).OtherErsatz))
 }
-
-// Error mocks base method.
-func (m *MockSource) Error() string {
-	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "Error")
-	ret0, _ := ret[0].(string)
-	return ret0
-}
-
-// Error indicates an expected call of Error.
-func (mr *MockSourceMockRecorder) Error() *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Error", reflect.TypeOf((*MockSource)(nil).Error))
-}
diff --git a/mockgen/internal/tests/mock_in_test_package/mock_test.go b/mockgen/internal/tests/mock_in_test_package/mock_test.go
index 4d598f03..f17a49ed 100644
--- a/mockgen/internal/tests/mock_in_test_package/mock_test.go
+++ b/mockgen/internal/tests/mock_in_test_package/mock_test.go
@@ -34,6 +34,18 @@ func (m *MockFinder) EXPECT() *MockFinderMockRecorder {
 	return m.recorder
 }
 
+// Add mocks base method.
+func (m *MockFinder) Add(u mock_in_test_package.User) {
+	m.ctrl.T.Helper()
+	m.ctrl.Call(m, "Add", u)
+}
+
+// Add indicates an expected call of Add.
+func (mr *MockFinderMockRecorder) Add(u interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Add", reflect.TypeOf((*MockFinder)(nil).Add), u)
+}
+
 // FindUser mocks base method.
 func (m *MockFinder) FindUser(name string) mock_in_test_package.User {
 	m.ctrl.T.Helper()
@@ -47,15 +59,3 @@ func (mr *MockFinderMockRecorder) FindUser(name interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "FindUser", reflect.TypeOf((*MockFinder)(nil).FindUser), name)
 }
-
-// Add mocks base method.
-func (m *MockFinder) Add(u mock_in_test_package.User) {
-	m.ctrl.T.Helper()
-	m.ctrl.Call(m, "Add", u)
-}
-
-// Add indicates an expected call of Add.
-func (mr *MockFinderMockRecorder) Add(u interface{}) *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Add", reflect.TypeOf((*MockFinder)(nil).Add), u)
-}
diff --git a/mockgen/internal/tests/test_package/mock_test.go b/mockgen/internal/tests/test_package/mock_test.go
index cc35b43d..b357165b 100644
--- a/mockgen/internal/tests/test_package/mock_test.go
+++ b/mockgen/internal/tests/test_package/mock_test.go
@@ -33,6 +33,18 @@ func (m *MockFinder) EXPECT() *MockFinderMockRecorder {
 	return m.recorder
 }
 
+// Add mocks base method.
+func (m *MockFinder) Add(u User) {
+	m.ctrl.T.Helper()
+	m.ctrl.Call(m, "Add", u)
+}
+
+// Add indicates an expected call of Add.
+func (mr *MockFinderMockRecorder) Add(u interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Add", reflect.TypeOf((*MockFinder)(nil).Add), u)
+}
+
 // FindUser mocks base method.
 func (m *MockFinder) FindUser(name string) User {
 	m.ctrl.T.Helper()
@@ -46,15 +58,3 @@ func (mr *MockFinderMockRecorder) FindUser(name interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "FindUser", reflect.TypeOf((*MockFinder)(nil).FindUser), name)
 }
-
-// Add mocks base method.
-func (m *MockFinder) Add(u User) {
-	m.ctrl.T.Helper()
-	m.ctrl.Call(m, "Add", u)
-}
-
-// Add indicates an expected call of Add.
-func (mr *MockFinderMockRecorder) Add(u interface{}) *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Add", reflect.TypeOf((*MockFinder)(nil).Add), u)
-}
diff --git a/mockgen/mockgen.go b/mockgen/mockgen.go
index ce483f87..e02b752f 100644
--- a/mockgen/mockgen.go
+++ b/mockgen/mockgen.go
@@ -424,7 +424,14 @@ func (g *generator) GenerateMockInterface(intf *model.Interface, outputPackagePa
 	return nil
 }
 
+type byMethodName []*model.Method
+
+func (b byMethodName) Len() int           { return len(b) }
+func (b byMethodName) Swap(i, j int)      { b[i], b[j] = b[j], b[i] }
+func (b byMethodName) Less(i, j int) bool { return b[i].Name < b[j].Name }
+
 func (g *generator) GenerateMockMethods(mockType string, intf *model.Interface, pkgOverride string) {
+	sort.Sort(byMethodName(intf.Methods))
 	for _, m := range intf.Methods {
 		g.p("")
 		_ = g.GenerateMockMethod(mockType, m, pkgOverride)