diff --git a/pkg/mutator/mutator.go b/pkg/mutator/mutator.go
index 053a8f21..ceaae6c5 100644
--- a/pkg/mutator/mutator.go
+++ b/pkg/mutator/mutator.go
@@ -298,6 +298,7 @@ func (mu *Mutator) getTestArgs() []string {
 	if mu.buildTags != "" {
 		args = append(args, "-tags", mu.buildTags)
 	}
+	args = append(args, "-timeout", (1*time.Second + mu.testExecutionTime).String())
 	args = append(args, "./...")
 
 	return args
diff --git a/pkg/mutator/mutator_test.go b/pkg/mutator/mutator_test.go
index 2cb3e947..eddbf2b0 100644
--- a/pkg/mutator/mutator_test.go
+++ b/pkg/mutator/mutator_test.go
@@ -372,7 +372,7 @@ func TestMutatorRun(t *testing.T) {
 
 	_ = mut.Run(context.Background())
 
-	want := "go test -tags tag1 tag2 ./..."
+	want := "go test -tags tag1 tag2 -timeout 21s ./..."
 	got := fmt.Sprintf("go %v", strings.Join(holder.args, " "))
 
 	if !cmp.Equal(got, want) {