diff --git a/gotext_test.go b/gotext_test.go
index d67df36..3081237 100644
--- a/gotext_test.go
+++ b/gotext_test.go
@@ -6,6 +6,29 @@ import (
 	"testing"
 )
 
+func TestGettersSetters(t *testing.T) {
+    SetDomain("test")
+    dom := GetDomain()
+    
+    if dom != "test" {
+        t.Errorf("Expected GetDomain to return 'test', but got '%s'", dom)
+    }
+    
+    SetLibrary("/tmp/test")
+    lib := GetLibrary()
+    
+    if lib != "/tmp/test" {
+        t.Errorf("Expected GetLibrary to return '/tmp/test', but got '%s'", lib)
+    }
+    
+    SetLanguage("es")
+    lang := GetLanguage()
+    
+    if lang != "es" {
+        t.Errorf("Expected GetLanguage to return 'es', but got '%s'", lang)
+    }
+}
+
 func TestPackageFunctions(t *testing.T) {
 	// Set PO content
 	str := `# Some comment
@@ -23,7 +46,10 @@ msgstr[1] "This one is the plural: %s"
 msgstr[2] "And this is the second plural form: %s"
 
     `
-
+    
+    // Set default configuration
+    Configure("/tmp", "en_US", "default")
+    
 	// Create Locales directory on default location
 	dirname := path.Clean(library + string(os.PathSeparator) + "en_US")
 	err := os.MkdirAll(dirname, os.ModePerm)
@@ -109,14 +135,14 @@ msgstr[2] "And this is the second plural form: %s"
 
 	// Test translations
 	go func(done chan bool) {
-		println(Get("My text"))
+		Get("My text")
 		done <- true
 	}(c1)
 
 	go func(done chan bool) {
-		println(Get("My text"))
+		Get("My text")
 		done <- true
 	}(c2)
 
-	println(Get("My text"))
+	Get("My text")
 }
diff --git a/locale_test.go b/locale_test.go
index 53a0897..b149a3e 100644
--- a/locale_test.go
+++ b/locale_test.go
@@ -47,6 +47,9 @@ msgstr[2] "And this is the second plural form: %s"
 
 	// Create Locale with full language code
 	l := NewLocale("/tmp", "en_US")
+	
+	// Force nil domain storage
+	l.domains = nil
 
 	// Add domain
 	l.AddDomain("my_domain")
@@ -68,6 +71,17 @@ msgstr[2] "And this is the second plural form: %s"
 	if tr != "And this is the second plural form: Variable" {
 		t.Errorf("Expected 'And this is the second plural form: Variable' but got '%s'", tr)
 	}
+	
+	// Test non-existent "deafult" domain responses
+	tr = l.Get("My text")
+	if tr != "My text" {
+		t.Errorf("Expected 'My text' but got '%s'", tr)
+	}
+	
+	tr = l.GetN("One with var: %s", "Several with vars: %s", 2, v)
+	if tr != "Several with vars: Variable" {
+		t.Errorf("Expected 'Several with vars: Variable' but got '%s'", tr)
+	}
 }
 
 func TestLocaleRace(t *testing.T) {
@@ -124,12 +138,12 @@ msgstr[2] "And this is the second plural form: %s"
 
 	// Get translations in goroutine
 	go func(l *Locale, done chan bool) {
-		println(l.GetD("race", "My text"))
+		l.GetD("race", "My text")
 		done <- true
 	}(l, rc)
 
 	// Get translations at top level
-	println(l.GetD("race", "My text"))
+	l.GetD("race", "My text")
 
 	// Wait for goroutines to finish
 	<-ac
diff --git a/po_test.go b/po_test.go
index 02ab8c4..31247bf 100644
--- a/po_test.go
+++ b/po_test.go
@@ -22,6 +22,12 @@ msgstr[0] "This one is the singular: %s"
 msgstr[1] "This one is the plural: %s"
 msgstr[2] "And this is the second plural form: %s"
 
+msgid "This one has invalid syntax translations"
+msgid_plural "Plural index"
+msgstr[abc] "Wrong index"
+msgstr[1 "Forgot to close brackets"
+msgstr[0] "Badly formatted string'
+
     `
 	// Write PO content to file
 	filename := path.Clean(os.TempDir() + string(os.PathSeparator) + "default.po")
@@ -37,8 +43,13 @@ msgstr[2] "And this is the second plural form: %s"
 		t.Fatalf("Can't write to test file: %s", err.Error())
 	}
 
-	// Parse po file
+	// Create po object
 	po := new(Po)
+	
+	// Try to parse a directory
+	po.ParseFile(path.Clean(os.TempDir()))
+	
+	// Parse file
 	po.ParseFile(filename)
 
 	// Test translations
@@ -58,6 +69,28 @@ msgstr[2] "And this is the second plural form: %s"
 	if tr != "And this is the second plural form: Variable" {
 		t.Errorf("Expected 'And this is the second plural form: Variable' but got '%s'", tr)
 	}
+	
+	// Test inexistent translations
+	tr = po.Get("This is a test")
+	if tr != "This is a test" {
+		t.Errorf("Expected 'This is a test' but got '%s'", tr)
+	}
+	
+	tr = po.GetN("This is a test", "This are tests", 1)
+	if tr != "This are tests" {
+		t.Errorf("Expected 'This are tests' but got '%s'", tr)
+	}
+	
+	// Test syntax error parsed translations
+	tr = po.Get("This one has invalid syntax translations")
+	if tr != "" {
+		t.Errorf("Expected '' but got '%s'", tr)
+	}
+	
+	tr = po.GetN("This one has invalid syntax translations", "This are tests", 1)
+	if tr != "Plural index" {
+		t.Errorf("Expected 'Plural index' but got '%s'", tr)
+	}
 }
 
 func TestPoRace(t *testing.T) {
@@ -93,12 +126,12 @@ msgstr[2] "And this is the second plural form: %s"
 
 	// Read some translation on a goroutine
 	go func(po *Po, done chan bool) {
-		println(po.Get("My text"))
+		po.Get("My text")
 		done <- true
 	}(po, rc)
 
 	// Read something at top level
-	println(po.Get("My text"))
+	po.Get("My text")
 
 	// Wait for goroutines to finish
 	<-pc