diff --git a/cgo/lapack_test.go b/cgo/lapack_test.go
index 0b0a117c..f946daa4 100644
--- a/cgo/lapack_test.go
+++ b/cgo/lapack_test.go
@@ -247,6 +247,10 @@ func BenchmarkDgeevAntisymRandomN200(b *testing.B) {
 	rnd := rand.New(rand.NewSource(1))
 	testlapack.DgeevBenchmark(b, impl, testlapack.NewAntisymRandom(200, rnd).Matrix())
 }
+func BenchmarkDgeevAntisymRandomN500(b *testing.B) {
+	rnd := rand.New(rand.NewSource(1))
+	testlapack.DgeevBenchmark(b, impl, testlapack.NewAntisymRandom(500, rnd).Matrix())
+}
 
 func BenchmarkDgeevCirculantN3(b *testing.B) {
 	testlapack.DgeevBenchmark(b, impl, testlapack.Circulant(3).Matrix())
@@ -269,3 +273,6 @@ func BenchmarkDgeevCirculantN100(b *testing.B) {
 func BenchmarkDgeevCirculantN200(b *testing.B) {
 	testlapack.DgeevBenchmark(b, impl, testlapack.Circulant(200).Matrix())
 }
+func BenchmarkDgeevCirculantN500(b *testing.B) {
+	testlapack.DgeevBenchmark(b, impl, testlapack.Circulant(500).Matrix())
+}
diff --git a/native/lapack_test.go b/native/lapack_test.go
index 2a8b70f8..b80b9ef5 100644
--- a/native/lapack_test.go
+++ b/native/lapack_test.go
@@ -381,6 +381,10 @@ func BenchmarkDgeevAntisymRandomN200(b *testing.B) {
 	rnd := rand.New(rand.NewSource(1))
 	testlapack.DgeevBenchmark(b, impl, testlapack.NewAntisymRandom(200, rnd).Matrix())
 }
+func BenchmarkDgeevAntisymRandomN500(b *testing.B) {
+	rnd := rand.New(rand.NewSource(1))
+	testlapack.DgeevBenchmark(b, impl, testlapack.NewAntisymRandom(500, rnd).Matrix())
+}
 
 func BenchmarkDgeevCirculantN3(b *testing.B) {
 	testlapack.DgeevBenchmark(b, impl, testlapack.Circulant(3).Matrix())
@@ -403,3 +407,6 @@ func BenchmarkDgeevCirculantN100(b *testing.B) {
 func BenchmarkDgeevCirculantN200(b *testing.B) {
 	testlapack.DgeevBenchmark(b, impl, testlapack.Circulant(200).Matrix())
 }
+func BenchmarkDgeevCirculantN500(b *testing.B) {
+	testlapack.DgeevBenchmark(b, impl, testlapack.Circulant(500).Matrix())
+}