diff --git a/clair/api.go b/clair/api.go
index e8bcf0b..0aa77ae 100644
--- a/clair/api.go
+++ b/clair/api.go
@@ -22,6 +22,7 @@ type apiV1 struct {
 }
 
 type apiV3 struct {
+	url    string
 	client clairpb.AncestryServiceClient
 }
 
@@ -52,11 +53,16 @@ func newAPIV3(url string) (*apiV3, error) {
 		runes := []rune(url)
 		url = string(runes[i+3:])
 	}
+	if strings.Index(url, ":") == -1 {
+		url = fmt.Sprintf("%s:6060", url)
+	}
 	conn, err := grpc.Dial(url, grpc.WithInsecure())
 	if err != nil {
 		return nil, fmt.Errorf("did not connect to %s: %v", url, err)
 	}
-	return &apiV3{clairpb.NewAncestryServiceClient(conn)}, nil
+	return &apiV3{
+		url:    url,
+		client: clairpb.NewAncestryServiceClient(conn)}, nil
 }
 
 func (a *apiV1) Push(image *docker.Image) error {
diff --git a/clair/api_test.go b/clair/api_test.go
new file mode 100644
index 0000000..191d788
--- /dev/null
+++ b/clair/api_test.go
@@ -0,0 +1,79 @@
+package clair
+
+import "testing"
+
+func TestNewAPIV1(t *testing.T) {
+	cases := []struct {
+		url      string
+		expected string
+	}{
+		{
+			url:      "http://localhost:6060",
+			expected: "http://localhost:6060",
+		},
+		{
+			url:      "http://localhost",
+			expected: "http://localhost:6060",
+		},
+		{
+			url:      "localhost",
+			expected: "http://localhost:6060",
+		},
+		{
+			url:      "https://localhost:6060",
+			expected: "https://localhost:6060",
+		},
+		{
+			url:      "https://localhost",
+			expected: "https://localhost:6060",
+		},
+	}
+	for _, tc := range cases {
+		api := newAPIV1(tc.url)
+		if api.url != tc.expected {
+			t.Errorf("expected %s got %s", api.url, tc.expected)
+		}
+	}
+}
+
+func TestNewAPIV3(t *testing.T) {
+	cases := []struct {
+		url      string
+		expected string
+	}{
+		{
+			url:      "http://localhost:6060",
+			expected: "localhost:6060",
+		},
+		{
+			url:      "http://localhost",
+			expected: "localhost:6060",
+		},
+		{
+			url:      "localhost",
+			expected: "localhost:6060",
+		},
+		{
+			url:      "https://localhost:6060",
+			expected: "localhost:6060",
+		},
+		{
+			url:      "https://localhost",
+			expected: "localhost:6060",
+		},
+		{
+			url:      "https://localhost:9090",
+			expected: "localhost:9090",
+		},
+	}
+	for _, tc := range cases {
+		api, err := newAPIV3(tc.url)
+		if err != nil {
+			t.Errorf("failed to initialize api v3: %s", err)
+			continue
+		}
+		if api.url != tc.expected {
+			t.Errorf("expected %s got %s", api.url, tc.expected)
+		}
+	}
+}