diff --git a/tape/types_test.go b/tape/types_test.go
index 39b623d..cd0fbd6 100644
--- a/tape/types_test.go
+++ b/tape/types_test.go
@@ -174,7 +174,7 @@ func TestGBEU(test *testing.T) {
 		}
 		test.Fatal(message)
 	}
-	decoded, _, err = DecodeGBEU[uint64](buffer[:])
+	decoded, n, err = DecodeGBEU[uint64](buffer[:])
 	if err != nil { test.Fatal(err) }
 	if correct, got := 3, n; correct != got {
 		test.Fatal("not equal:", got)
@@ -184,7 +184,7 @@ func TestGBEU(test *testing.T) {
 	}
 
 	maxGBEU64 := []byte { 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F }
-	_, err = EncodeGBEU[uint64](buffer[:], 0xFFFFFFFFFFFFFFFF)
+	n, err = EncodeGBEU[uint64](buffer[:], 0xFFFFFFFFFFFFFFFF)
 	if err != nil { test.Fatal(err) }
 	if correct, got := 10, n; correct != got {
 		test.Fatal("not equal:", got)
@@ -196,7 +196,7 @@ func TestGBEU(test *testing.T) {
 		}
 		test.Fatal(message)
 	}
-	decoded, _, err = DecodeGBEU[uint64](buffer[:])
+	decoded, n, err = DecodeGBEU[uint64](buffer[:])
 	if err != nil { test.Fatal(err) }
 	if correct, got := 10, n; correct != got {
 		test.Fatal("not equal:", got)
@@ -205,7 +205,7 @@ func TestGBEU(test *testing.T) {
 		test.Fatalf("not equal: %x", got)
 	}
 
-	_, err = EncodeGBEU[uint64](buffer[:], 11)
+	n, err = EncodeGBEU[uint64](buffer[:], 11)
 	if err != nil { test.Fatal(err) }
 	if correct, got := 1, n; correct != got {
 		test.Fatal("not equal:", got)
@@ -213,7 +213,7 @@ func TestGBEU(test *testing.T) {
 	if correct, got := byte(0xb), buffer[0]; correct != got {
 		test.Fatal("not equal:", got)
 	}
-	decoded, _, err = DecodeGBEU[uint64](buffer[:])
+	decoded, n, err = DecodeGBEU[uint64](buffer[:])
 	if err != nil { test.Fatal(err) }
 	if correct, got := 1, n; correct != got {
 		test.Fatal("not equal:", got)