diff --git a/charger/go-e-test.go b/charger/go-e-test.go
index 50f9217bb..87b4f01b8 100644
--- a/charger/go-e-test.go
+++ b/charger/go-e-test.go
@@ -11,7 +11,7 @@ func TestGoE(t *testing.T) {
 	var wb api.Charger = NewGoE("foo")
 
 	if _, ok := wb.(api.MeterCurrent); !ok {
-		t.Error("missing MeterCurrents interface")
+		t.Error("missing MeterCurrent interface")
 	}
 
 	if _, ok := wb.(api.ChargeRater); !ok {
diff --git a/charger/keba_test.go b/charger/keba_test.go
index f299299e6..19f891065 100644
--- a/charger/keba_test.go
+++ b/charger/keba_test.go
@@ -14,7 +14,7 @@ func TestKeba(t *testing.T) {
 	}
 
 	if _, ok := wb.(api.MeterCurrent); !ok {
-		t.Error("missing MeterCurrents interface")
+		t.Error("missing MeterCurrent interface")
 	}
 
 	if _, ok := wb.(api.ChargeRater); !ok {
diff --git a/charger/nrgble_linux_test.go b/charger/nrgble_linux_test.go
index 80e27ac1e..4150e33a5 100644
--- a/charger/nrgble_linux_test.go
+++ b/charger/nrgble_linux_test.go
@@ -10,6 +10,6 @@ func TestNRGKickBLE(t *testing.T) {
 	var wb api.Charger = &NRGKickBLE{}
 
 	if _, ok := wb.(api.MeterCurrent); !ok {
-		t.Error("missing MeterCurrents interface")
+		t.Error("missing MeterCurrent interface")
 	}
 }
diff --git a/charger/nrgconnect_test.go b/charger/nrgconnect_test.go
index 14e2641c5..04dd6f509 100644
--- a/charger/nrgconnect_test.go
+++ b/charger/nrgconnect_test.go
@@ -14,6 +14,6 @@ func TestNRGKickConnect(t *testing.T) {
 	}
 
 	if _, ok := wb.(api.MeterCurrent); !ok {
-		t.Error("missing MeterCurrents interface")
+		t.Error("missing MeterCurrent interface")
 	}
 }