diff --git a/hugolib/datafiles_test.go b/hugolib/datafiles_test.go
index 3aac3201f..5beb59249 100644
--- a/hugolib/datafiles_test.go
+++ b/hugolib/datafiles_test.go
@@ -98,15 +98,6 @@ func TestDataDirMultipleSources(t *testing.T) {
 
 }
 
-func TestDataDirUnknownFormat(t *testing.T) {
-	t.Parallel()
-
-	sources := []source.ByteSource{
-		{Name: filepath.FromSlash("data/test.roml"), Content: []byte("boo")},
-	}
-	doTestDataDir(t, true, sources)
-}
-
 func doTestDataDir(t *testing.T, expected interface{}, sources []source.ByteSource, configKeyValues ...interface{}) {
 	var (
 		cfg, fs = newTestCfg()
diff --git a/hugolib/site.go b/hugolib/site.go
index d8e40f039..3b7d47533 100644
--- a/hugolib/site.go
+++ b/hugolib/site.go
@@ -841,7 +841,8 @@ func (s *Site) loadData(sources []source.Input) (err error) {
 
 			data, err := s.readData(r)
 			if err != nil {
-				return fmt.Errorf("Failed to read data from %s: %s", filepath.Join(r.Path(), r.LogicalName()), err)
+				s.Log.WARN.Printf("Failed to read data from %s: %s", filepath.Join(r.Path(), r.LogicalName()), err)
+				continue
 			}
 
 			if data == nil {