3 files changed, 25 insertions, 12 deletions
diff --git a/sort/insertion_test.go b/sort/insertion_test.go
index afec414..7be863d 100644
--- a/sort/insertion_test.go
+++ b/sort/insertion_test.go
@@ -1,7 +1,6 @@
 package sort
 
 import (
-	"algorithms/ds"
 	"testing"
 )
 
@@ -11,10 +10,8 @@ func BenchmarkInsertion(b *testing.B) {
 	benchmark("Insertion", 1000, Insertion, b)
 }
 
-func TestInsertion1000(t *testing.T) {
-	a := ds.RandomIntegers(1000, 1000)
-	a = Insertion(a)
-	if !Sorted(a) {
-		t.Errorf("Array not sorted: %v", a)
+func TestInsertion(t *testing.T) {
+	for i := 1; i <= 1000; i *= 10 {
+		test("Insertion", i, Insertion, t)
 	}
 }
diff --git a/sort/selection_test.go b/sort/selection_test.go
index c5d6beb..f432474 100644
--- a/sort/selection_test.go
+++ b/sort/selection_test.go
@@ -1,7 +1,6 @@
 package sort
 
 import (
-	"algorithms/ds"
 	"testing"
 )
 
@@ -11,10 +10,8 @@ func BenchmarkSelection(b *testing.B) {
 	benchmark("Selection", 1000, Selection, b)
 }
 
-func TestSelection1000(t *testing.T) {
-	a := ds.RandomIntegers(1000, 1000)
-	a = Selection(a)
-	if !Sorted(a) {
-		t.Errorf("Array not sorted: %v", a)
+func TestSelection(t *testing.T) {
+	for i := 1; i <= 1000; i *= 10 {
+		test("Selection", i, Selection, t)
 	}
 }
diff --git a/sort/test.go b/sort/test.go
new file mode 100644
index 0000000..fa12555
--- /dev/null
+++ b/sort/test.go
@@ -0,0 +1,19 @@
+package sort
+
+import (
+	"algorithms/ds"
+	"fmt"
+	"testing"
+)
+
+func test(name string, length int, sort func([]ds.Comparer) []ds.Comparer, t *testing.T) {
+	cb := func(t *testing.T) {
+		t.Parallel()
+		a := ds.RandomIntegers(length, length)
+		a = sort(a)
+		if !Sorted(a) {
+			t.Errorf("Array not sorted: %v", a)
+		}
+	}
+	t.Run(fmt.Sprintf("Test%s%d", name, length), cb)
+}