diff --git a/service/service.go b/service/service.go
index a6e7203..34389f3 100644
--- a/service/service.go
+++ b/service/service.go
@@ -129,7 +129,7 @@ func enrichBinding(binding config.ServiceBinding) config.ServiceBinding {
 			}
 
 			// set host and port too if still missing
-			h, p, _ := net.SplitHostPort(u.Host)
+			h, p, _ := net.SplitHostPort(canonicalHost(u))
 			if len(binding.Host) == 0 {
 				binding.Host = h
 			}
@@ -186,3 +186,18 @@ func GetService(serviceType, serviceName string) config.Service {
 	}
 	return config.Service{}
 }
+
+// canonicalHost returns url.Host but always with a ":port" suffix
+// adapted from net/http/transport canonicalAddr
+func canonicalHost(url *url.URL) string {
+	portMap := map[string]string{
+		"http":  "80",
+		"https": "443",
+	}
+	addr := url.Hostname()
+	port := url.Port()
+	if port == "" {
+		port = portMap[url.Scheme]
+	}
+	return net.JoinHostPort(addr, port)
+}
diff --git a/service/service_test.go b/service/service_test.go
new file mode 100644
index 0000000..f59557c
--- /dev/null
+++ b/service/service_test.go
@@ -0,0 +1,48 @@
+package service
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/swisscom/backman/config"
+)
+
+func Test_Service_EnrichBinding(t *testing.T) {
+	config.SetConfigFile("_fixtures/config_without_bindings.json")
+
+	os.Unsetenv("SERVICE_BINDING_ROOT")
+
+	c := config.Get()
+	mergeVCAPServices()
+
+	elasticsearchServiceConfig := c.Services["my-elasticsearch"]
+
+	// without enrichBinding is port undefined
+	assert.Equal(t, 0, elasticsearchServiceConfig.Binding.Port)
+
+	// if port is defined in uri, it is determined from there
+	elasticsearchServiceConfig.Binding = enrichBinding(elasticsearchServiceConfig.Binding)
+	assert.Equal(t, 443, elasticsearchServiceConfig.Binding.Port)
+
+	// if no port is defined in uri, it is determined by schema/protocol
+	elasticsearchServiceConfig.Binding.Host = "https://0c061730-1b19-424b-8efd-349fd40957a0.yolo.elasticsearch.lyra-836.appcloud.swisscom.com"
+	elasticsearchServiceConfig.Binding.URI = elasticsearchServiceConfig.Binding.Host
+	elasticsearchServiceConfig.Binding.Port = 0
+	elasticsearchServiceConfig.Binding = enrichBinding(elasticsearchServiceConfig.Binding)
+	assert.Equal(t, 443, elasticsearchServiceConfig.Binding.Port)
+
+	// if no port is defined in uri, it is determined by schema/protocol
+	elasticsearchServiceConfig.Binding.Host = "http://0c061730-1b19-424b-8efd-349fd40957a0.yolo.elasticsearch.lyra-836.appcloud.swisscom.com"
+	elasticsearchServiceConfig.Binding.URI = elasticsearchServiceConfig.Binding.Host
+	elasticsearchServiceConfig.Binding.Port = 0
+	elasticsearchServiceConfig.Binding = enrichBinding(elasticsearchServiceConfig.Binding)
+	assert.Equal(t, 80, elasticsearchServiceConfig.Binding.Port)
+
+	// if no port is defined in uri, it is determined by schema/protocol, but only known ones
+	elasticsearchServiceConfig.Binding.Host = "nonehttp://0c061730-1b19-424b-8efd-349fd40957a0.yolo.elasticsearch.lyra-836.appcloud.swisscom.com"
+	elasticsearchServiceConfig.Binding.URI = elasticsearchServiceConfig.Binding.Host
+	elasticsearchServiceConfig.Binding.Port = 0
+	elasticsearchServiceConfig.Binding = enrichBinding(elasticsearchServiceConfig.Binding)
+	assert.Equal(t, 0, elasticsearchServiceConfig.Binding.Port)
+}
diff --git a/service/vcap_services_test.go b/service/vcap_services_test.go
new file mode 100644
index 0000000..025a862
--- /dev/null
+++ b/service/vcap_services_test.go
@@ -0,0 +1,26 @@
+package service
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/swisscom/backman/config"
+)
+
+func Test_Service_MergeVCAPServices(t *testing.T) {
+	config.SetConfigFile("_fixtures/config_without_bindings.json")
+
+	os.Unsetenv("SERVICE_BINDING_ROOT")
+
+	c := config.Get()
+	mergeVCAPServices()
+
+	assert.Equal(t, "postgres", c.Services["my_postgres_db"].Binding.Type)
+	assert.Equal(t, "127.0.0.1", c.Services["my_postgres_db"].Binding.Host)
+	assert.Equal(t, 5432, c.Services["my_postgres_db"].Binding.Port)
+	assert.Equal(t, "dev-user", c.Services["my_postgres_db"].Binding.Username)
+	assert.Equal(t, "dev-secret", c.Services["my_postgres_db"].Binding.Password)
+	assert.Equal(t, "postgres://dev-user:dev-secret@127.0.0.1:5432/my_postgres_db?sslmode=disable", c.Services["my_postgres_db"].Binding.URI)
+	assert.Equal(t, "https://0c061730-1b19-424b-8efd-349fd40957a0.yolo.elasticsearch.lyra-836.appcloud.swisscom.com:443", c.Services["my-elasticsearch"].Binding.URI)
+}