verror: addressing https://github.com/veyron/release-issues/issues/1080

MultiPart: 1/3
Change-Id: I190b1dd5004025dac6acfd58f59483588bf70d9d
diff --git a/lib/exec/config_test.go b/lib/exec/config_test.go
index e3b9763..cdda17f 100644
--- a/lib/exec/config_test.go
+++ b/lib/exec/config_test.go
@@ -16,8 +16,8 @@
 }
 
 func checkAbsent(t *testing.T, c Config, k string) {
-	if v, err := c.Get(k); !verror.Is(err, verror.NoExist.ID) {
-		t.Errorf("Expected (\"\", %v) for key %q, got (%q, %v) instead", verror.NoExist, k, v, err)
+	if v, err := c.Get(k); !verror.Is(err, verror.ErrNoExist.ID) {
+		t.Errorf("Expected (\"\", %v) for key %q, got (%q, %v) instead", verror.ErrNoExist, k, v, err)
 	}
 }