diff --git a/test.c b/test.c
index 7904527..387c0b2 100644
--- a/test.c
+++ b/test.c
@@ -57,6 +57,86 @@ struct {
 	double *A, *B;
 	int m, n;
 } transp_tests[] = {
+	{
+		.A = (double[]) {
+			1, 0, 0, 0,
+			0, 2, 0, 0,
+			0, 0, 3, 0,
+			0, 0, 0, 4,
+		},
+		.B = (double[]) {
+			1, 0, 0, 0,
+			0, 2, 0, 0,
+			0, 0, 3, 0,
+			0, 0, 0, 4,
+		},
+		.m = 4,
+		.n = 4,
+	},
+	{
+		.A = (double[]) {
+			1, 2, 3, 4,
+			0, 0, 0, 0,
+			0, 0, 0, 0,
+			0, 0, 0, 0,
+		},
+		.B = (double[]) {
+			1, 0, 0, 0,
+			2, 0, 0, 0,
+			3, 0, 0, 0,
+			4, 0, 0, 0,
+		},
+		.m = 4,
+		.n = 4,
+	},
+	{
+		.A = (double[]) {
+			0, 1, 0, 0,
+			0, 2, 0, 0,
+			0, 3, 0, 0,
+			0, 4, 0, 0,
+		},
+		.B = (double[]) {
+			0, 0, 0, 0,
+			1, 2, 3, 4,
+			0, 0, 0, 0,
+			0, 0, 0, 0,
+		},
+		.m = 4,
+		.n = 4,
+	},
+	{
+		.A = (double[]) {
+			0, 0, 1, 0,
+			0, 0, 2, 0,
+			0, 0, 3, 0,
+			0, 0, 4, 0,
+		},
+		.B = (double[]) {
+			0, 0, 0, 0,
+			0, 0, 0, 0,
+			1, 2, 3, 4,
+			0, 0, 0, 0,
+		},
+		.m = 4,
+		.n = 4,
+	},
+	{
+		.A = (double[]) {
+			0, 0, 0, 1,
+			0, 0, 0, 2,
+			0, 0, 0, 3,
+			0, 0, 0, 4,
+		},
+		.B = (double[]) {
+			0, 0, 0, 0,
+			0, 0, 0, 0,
+			0, 0, 0, 0,
+			1, 2, 3, 4,
+		},
+		.m = 4,
+		.n = 4,
+	},
 	{
 		.A = (double[]) {
 			1, 0, 0,