diff --git a/drbd_metrics.go b/drbd_metrics.go
index 06cd7f4..d50f2e4 100644
--- a/drbd_metrics.go
+++ b/drbd_metrics.go
@@ -173,11 +173,9 @@ func (c *drbdCollector) setDrbdSplitBrainMetric(ch chan<- prometheus.Metric) {
 
 	// set split brain metric
 	// by default if the custom hook is not set, the exporter will not be able to detect it
-	files, err := ioutil.ReadDir(c.drbdSplitBrainPath)
-	if err != nil {
-		log.Warnf("Error while reading directory %s: %s", c.drbdSplitBrainPath, err)
-	}
+	files, _ := ioutil.ReadDir(c.drbdSplitBrainPath)
 
+	// the split brain files exists
 	for _, f := range files {
 		// check if in directory there are file of syntax we expect (nil is when there is not any)
 		match, _ := filepath.Glob(c.drbdSplitBrainPath + "/drbd-split-brain-detected-*")
diff --git a/drbd_metrics_test.go b/drbd_metrics_test.go
index 5d12269..1db6052 100644
--- a/drbd_metrics_test.go
+++ b/drbd_metrics_test.go
@@ -2,7 +2,10 @@ package main
 
 import (
 	"os"
+	"strings"
 	"testing"
+
+	"github.com/prometheus/client_golang/prometheus/testutil"
 )
 
 func TestDrbdParsing(t *testing.T) {
@@ -229,6 +232,14 @@ func TestNewDrbdCollectorChecksDrbdsetupExecutableBits(t *testing.T) {
 
 func TestDRBDCollector(t *testing.T) {
 	clock = StoppedClock{}
+
+	collector, _ := NewDrbdCollector("test/fake_drbdsetup.sh", "fake")
+	expectMetrics(t, collector, "drbd.metrics")
+
+}
+
+func TestDRBDSplitbrainCollector(t *testing.T) {
+	clock = StoppedClock{}
 	splitBrainDir := "/var/tmp/drbd/splitbrain"
 	testFiles := [3]string{
 		"drbd-split-brain-detected-resource01-vol01",
@@ -247,8 +258,17 @@ func TestDRBDCollector(t *testing.T) {
 		os.Create(splitBrainDir + "/" + testFile)
 	}
 	defer os.RemoveAll(splitBrainDir)
+	// we use by intent a wrong exec (cibadmin) so we can just have splitbrain metrics
+	collector, _ := NewDrbdCollector("test/fake_cibadmin.sh", splitBrainDir)
 
-	collector, _ := NewDrbdCollector("test/fake_drbdsetup.sh", splitBrainDir)
-	expectMetrics(t, collector, "drbd.metrics")
+	expect := `
+	# HELP ha_cluster_drbd_split_brain Whether a split brain has been detected; 1 line per resource, per volume.
+	# TYPE ha_cluster_drbd_split_brain gauge
+	ha_cluster_drbd_split_brain{resource="resource01",volume="vol01"} 1 1234
+	ha_cluster_drbd_split_brain{resource="resource02",volume="vol02"} 1 1234
+	`
 
+	if err := testutil.CollectAndCompare(collector, strings.NewReader(expect)); err != nil {
+		t.Fatal(err)
+	}
 }
diff --git a/test/drbd.metrics b/test/drbd.metrics
index 443ac1f..f6bbc92 100644
--- a/test/drbd.metrics
+++ b/test/drbd.metrics
@@ -1,11 +1,19 @@
+# HELP ha_cluster_drbd_al_writes Writes to activity log; 1 line per res, per volume
+# TYPE ha_cluster_drbd_al_writes gauge
+ha_cluster_drbd_al_writes{resource="1-single-0",volume="0"} 123 1234
+ha_cluster_drbd_al_writes{resource="1-single-1",volume="0"} 123 1234
+# HELP ha_cluster_drbd_bm_writes Writes to bitmap; 1 line per res, per volume
+# TYPE ha_cluster_drbd_bm_writes gauge
+ha_cluster_drbd_bm_writes{resource="1-single-0",volume="0"} 321 1234
+ha_cluster_drbd_bm_writes{resource="1-single-1",volume="0"} 321 1234
 # HELP ha_cluster_drbd_connections The DRBD resource connections; 1 line per per resource, per peer_node_id
 # TYPE ha_cluster_drbd_connections gauge
 ha_cluster_drbd_connections{peer_disk_state="uptodate",peer_node_id="1",peer_role="Primary",resource="1-single-0",volume="0"} 1 1234
 ha_cluster_drbd_connections{peer_disk_state="uptodate",peer_node_id="1",peer_role="Primary",resource="1-single-1",volume="0"} 1 1234
-# HELP ha_cluster_drbd_connections_sync The in sync percentage value for DRBD resource connections
-# TYPE ha_cluster_drbd_connections_sync gauge
-ha_cluster_drbd_connections_sync{peer_node_id="1",resource="1-single-0",volume="0"} 100 1234
-ha_cluster_drbd_connections_sync{peer_node_id="1",resource="1-single-1",volume="0"} 100 1234
+# HELP ha_cluster_drbd_connections_pending Pending value per connection
+# TYPE ha_cluster_drbd_connections_pending gauge
+ha_cluster_drbd_connections_pending{peer_node_id="1",resource="1-single-0",volume="0"} 3 1234
+ha_cluster_drbd_connections_pending{peer_node_id="1",resource="1-single-1",volume="0"} 3 1234
 # HELP ha_cluster_drbd_connections_received KiB received per connection
 # TYPE ha_cluster_drbd_connections_received gauge
 ha_cluster_drbd_connections_received{peer_node_id="1",resource="1-single-0",volume="0"} 456 1234
@@ -14,34 +22,14 @@ ha_cluster_drbd_connections_received{peer_node_id="1",resource="1-single-1",volu
 # TYPE ha_cluster_drbd_connections_sent gauge
 ha_cluster_drbd_connections_sent{peer_node_id="1",resource="1-single-0",volume="0"} 654 1234
 ha_cluster_drbd_connections_sent{peer_node_id="1",resource="1-single-1",volume="0"} 654 1234
-# HELP ha_cluster_drbd_connections_pending Pending value per connection
-# TYPE ha_cluster_drbd_connections_pending gauge
-ha_cluster_drbd_connections_pending{peer_node_id="1",resource="1-single-0",volume="0"} 3 1234
-ha_cluster_drbd_connections_pending{peer_node_id="1",resource="1-single-1",volume="0"} 3 1234
+# HELP ha_cluster_drbd_connections_sync The in sync percentage value for DRBD resource connections
+# TYPE ha_cluster_drbd_connections_sync gauge
+ha_cluster_drbd_connections_sync{peer_node_id="1",resource="1-single-0",volume="0"} 100 1234
+ha_cluster_drbd_connections_sync{peer_node_id="1",resource="1-single-1",volume="0"} 100 1234
 # HELP ha_cluster_drbd_connections_unacked Unacked value per connection
 # TYPE ha_cluster_drbd_connections_unacked gauge
 ha_cluster_drbd_connections_unacked{peer_node_id="1",resource="1-single-0",volume="0"} 4 1234
 ha_cluster_drbd_connections_unacked{peer_node_id="1",resource="1-single-1",volume="0"} 4 1234
-# HELP ha_cluster_drbd_written KiB written to DRBD; 1 line per res, per volume
-# TYPE ha_cluster_drbd_written gauge
-ha_cluster_drbd_written{resource="1-single-0",volume="0"} 123456 1234
-ha_cluster_drbd_written{resource="1-single-1",volume="0"} 123456 1234
-# HELP ha_cluster_drbd_read KiB read from DRBD; 1 line per res, per volume
-# TYPE ha_cluster_drbd_read gauge
-ha_cluster_drbd_read{resource="1-single-0",volume="0"} 654321 1234
-ha_cluster_drbd_read{resource="1-single-1",volume="0"} 654321 1234
-# HELP ha_cluster_drbd_al_writes Writes to activity log; 1 line per res, per volume
-# TYPE ha_cluster_drbd_al_writes gauge
-ha_cluster_drbd_al_writes{resource="1-single-0",volume="0"} 123 1234
-ha_cluster_drbd_al_writes{resource="1-single-1",volume="0"} 123 1234
-# HELP ha_cluster_drbd_bm_writes Writes to bitmap; 1 line per res, per volume
-# TYPE ha_cluster_drbd_bm_writes gauge
-ha_cluster_drbd_bm_writes{resource="1-single-0",volume="0"} 321 1234
-ha_cluster_drbd_bm_writes{resource="1-single-1",volume="0"} 321 1234
-# HELP ha_cluster_drbd_upper_pending Upper pending; 1 line per res, per volume
-# TYPE ha_cluster_drbd_upper_pending gauge
-ha_cluster_drbd_upper_pending{resource="1-single-0",volume="0"} 1 1234
-ha_cluster_drbd_upper_pending{resource="1-single-1",volume="0"} 1 1234
 # HELP ha_cluster_drbd_lower_pending Lower pending; 1 line per res, per volume
 # TYPE ha_cluster_drbd_lower_pending gauge
 ha_cluster_drbd_lower_pending{resource="1-single-0",volume="0"} 2 1234
@@ -50,11 +38,19 @@ ha_cluster_drbd_lower_pending{resource="1-single-1",volume="0"} 2 1234
 # TYPE ha_cluster_drbd_quorum gauge
 ha_cluster_drbd_quorum{resource="1-single-0",volume="0"} 1 1234
 ha_cluster_drbd_quorum{resource="1-single-1",volume="0"} 0 1234
+# HELP ha_cluster_drbd_read KiB read from DRBD; 1 line per res, per volume
+# TYPE ha_cluster_drbd_read gauge
+ha_cluster_drbd_read{resource="1-single-0",volume="0"} 654321 1234
+ha_cluster_drbd_read{resource="1-single-1",volume="0"} 654321 1234
 # HELP ha_cluster_drbd_resources The DRBD resources; 1 line per name, per volume
 # TYPE ha_cluster_drbd_resources gauge
 ha_cluster_drbd_resources{disk_state="uptodate",resource="1-single-0",role="Secondary",volume="0"} 1 1234
 ha_cluster_drbd_resources{disk_state="uptodate",resource="1-single-1",role="Secondary",volume="0"} 1 1234
-# HELP ha_cluster_drbd_split_brain Whether a split brain has been detected; 1 line per resource, per volume.
-# TYPE ha_cluster_drbd_split_brain gauge
-ha_cluster_drbd_split_brain{resource="resource01",volume="vol01"} 1 1234
-ha_cluster_drbd_split_brain{resource="resource02",volume="vol02"} 1 1234
+# HELP ha_cluster_drbd_upper_pending Upper pending; 1 line per res, per volume
+# TYPE ha_cluster_drbd_upper_pending gauge
+ha_cluster_drbd_upper_pending{resource="1-single-0",volume="0"} 1 1234
+ha_cluster_drbd_upper_pending{resource="1-single-1",volume="0"} 1 1234
+# HELP ha_cluster_drbd_written KiB written to DRBD; 1 line per res, per volume
+# TYPE ha_cluster_drbd_written gauge
+ha_cluster_drbd_written{resource="1-single-0",volume="0"} 123456 1234
+ha_cluster_drbd_written{resource="1-single-1",volume="0"} 123456 1234