diff --git a/imageproxy_test.go b/imageproxy_test.go
index 59d2183..3a9d9a4 100644
--- a/imageproxy_test.go
+++ b/imageproxy_test.go
@@ -181,7 +181,7 @@ func TestProxy_ServeHTTP(t *testing.T) {
 		p.ServeHTTP(resp, req)
 
 		if got, want := resp.Code, tt.code; got != want {
-			t.Errorf("ServeHTTP(%q) returned status %d, want %d", req, got, want)
+			t.Errorf("ServeHTTP(%v) returned status %d, want %d", req, got, want)
 		}
 	}
 }
@@ -200,10 +200,10 @@ func TestProxy_ServeHTTP_is304(t *testing.T) {
 	p.ServeHTTP(resp, req)
 
 	if got, want := resp.Code, http.StatusNotModified; got != want {
-		t.Errorf("ServeHTTP(%q) returned status %d, want %d", req, got, want)
+		t.Errorf("ServeHTTP(%v) returned status %d, want %d", req, got, want)
 	}
 	if got, want := resp.Header().Get("Etag"), `"tag"`; got != want {
-		t.Errorf("ServeHTTP(%q) returned etag header %v, want %v", req, got, want)
+		t.Errorf("ServeHTTP(%v) returned etag header %v, want %v", req, got, want)
 	}
 }
 
@@ -237,7 +237,7 @@ func TestTransformingTransport(t *testing.T) {
 			t.Errorf("RoundTrip(%v) did not return expected error", tt.url)
 		}
 		if got, want := resp.StatusCode, tt.code; got != want {
-			t.Errorf("RoundTrip(%v) returned status code %d, want %d", got, want)
+			t.Errorf("RoundTrip(%v) returned status code %d, want %d", tt.url, got, want)
 		}
 	}
 }
diff --git a/transform.go b/transform.go
index 2f6840d..241a38d 100644
--- a/transform.go
+++ b/transform.go
@@ -24,8 +24,8 @@ import (
 	"github.com/disintegration/imaging"
 )
 
-// compression quality of resized jpegs
-const jpegQuality = 95
+// default compression quality of resized jpegs
+const defaultQuality = 95
 
 // resample filter used when resizing images
 var resampleFilter = imaging.Lanczos
@@ -54,9 +54,8 @@ func Transform(img []byte, opt Options) ([]byte, error) {
 		gif.Encode(buf, m, nil)
 	case "jpeg":
 		quality := opt.Quality
-
 		if quality == 0 {
-			quality = jpegQuality
+			quality = defaultQuality
 		}
 
 		jpeg.Encode(buf, m, &jpeg.Options{Quality: quality})
diff --git a/transform_test.go b/transform_test.go
index f5281bb..60efde5 100644
--- a/transform_test.go
+++ b/transform_test.go
@@ -60,10 +60,10 @@ func TestTransform(t *testing.T) {
 
 		out, err := Transform(in, emptyOptions)
 		if err != nil {
-			t.Errorf("Transform with encoder %s returned unexpected error: %v", err)
+			t.Errorf("Transform with encoder %s returned unexpected error: %v", tt.name, err)
 		}
 		if !reflect.DeepEqual(in, out) {
-			t.Errorf("Transform with with encoder %s with empty options returned modified result")
+			t.Errorf("Transform with with encoder %s with empty options returned modified result", tt.name)
 		}
 
 		out, err = Transform(in, Options{Width: -1, Height: -1})