diff --git a/handlers/sshd_config/ast/listener.go b/handlers/sshd_config/ast/listener.go
index c574f96..d7d51db 100644
--- a/handlers/sshd_config/ast/listener.go
+++ b/handlers/sshd_config/ast/listener.go
@@ -11,15 +11,15 @@ func createListener(
 	context *sshListenerContext,
 ) sshParserListener {
 	return sshParserListener{
-		Config: config,
-		Errors: make([]common.LSPError, 0),
+		Config:     config,
+		Errors:     make([]common.LSPError, 0),
 		sshContext: context,
 	}
 }
 
 type sshListenerContext struct {
 	line              uint32
-	currentOption    *SSHOption
+	currentOption     *SSHOption
 	currentMatchBlock *SSHMatchBlock
 	isKeyAMatchBlock  bool
 }
@@ -94,14 +94,14 @@ func (s *sshParserListener) ExitValue(ctx *parser.ValueContext) {
 	if s.sshContext.isKeyAMatchBlock {
 		location := common.CharacterRangeFromCtx(ctx.BaseParserRuleContext)
 		location.ChangeBothLines(s.sshContext.line)
-		
+
 		rawEntry, _ := s.Config.Options.Get(location.Start.Line)
 		entry := rawEntry.(*SSHOption)
 
 		// Overwrite the current match block
 		matchBlock := &SSHMatchBlock{
 			LocationRange: location,
-			MatchEntry: entry,
+			MatchEntry:    entry,
 		}
 		s.Config.Options.Put(
 			location.Start.Line,
@@ -114,4 +114,3 @@ func (s *sshParserListener) ExitValue(ctx *parser.ValueContext) {
 
 	s.sshContext.currentOption = nil
 }
-
diff --git a/handlers/sshd_config/ast/parser.go b/handlers/sshd_config/ast/parser.go
index 9143211..fc510ee 100644
--- a/handlers/sshd_config/ast/parser.go
+++ b/handlers/sshd_config/ast/parser.go
@@ -60,7 +60,7 @@ func (c *SSHConfig) parseStatement(
 	stream := antlr.NewInputStream(input)
 
 	lexerErrorListener := createErrorListener(context.line)
-	lexer := parser.NewConfigLexer(&stream)
+	lexer := parser.NewConfigLexer(stream)
 	lexer.RemoveErrorListeners()
 	lexer.AddErrorListener(&lexerErrorListener)
 
@@ -83,4 +83,3 @@ func (c *SSHConfig) parseStatement(
 
 	return errors
 }
-
diff --git a/handlers/sshd_config/ast/parser_test.go b/handlers/sshd_config/ast/parser_test.go
new file mode 100644
index 0000000..3b3626e
--- /dev/null
+++ b/handlers/sshd_config/ast/parser_test.go
@@ -0,0 +1,60 @@
+package ast
+
+import (
+	"config-lsp/utils"
+	"testing"
+)
+
+func TestSimpleParserExample(
+	t *testing.T,
+) {
+	input := utils.Dedent(`
+PermitRootLogin no
+PasswordAuthentication yes
+`)
+	p := NewSSHConfig()
+	errors := p.Parse(input)
+
+	if len(errors) != 0 {
+		t.Fatalf("Expected no errors, got %v", errors)
+	}
+
+	if !(p.Options.Size() == 2 &&
+		len(utils.KeysOfMap(p.CommentLines)) == 0) {
+		t.Errorf("Expected 2 options and no comment lines, but got: %v, %v", p.Options, p.CommentLines)
+	}
+
+	rawFirstEntry, _ := p.Options.Get(uint32(0))
+	firstEntry := rawFirstEntry.(*SSHOption)
+
+	if !(firstEntry.Value == "PermitRootLogin no" &&
+		firstEntry.LocationRange.Start.Line == 0 &&
+		firstEntry.LocationRange.End.Line == 0 &&
+		firstEntry.LocationRange.Start.Character == 0 &&
+		firstEntry.LocationRange.End.Character == 18 &&
+		firstEntry.Key.Value == "PermitRootLogin" &&
+		firstEntry.Key.LocationRange.Start.Character == 0 &&
+		firstEntry.Key.LocationRange.End.Character == 15 &&
+		firstEntry.OptionValue.Value == "no" &&
+		firstEntry.OptionValue.LocationRange.Start.Character == 16 &&
+		firstEntry.OptionValue.LocationRange.End.Character == 18) {
+		t.Errorf("Expected first entry to be PermitRootLogin no, but got: %v", firstEntry)
+	}
+
+	rawSecondEntry, _ := p.Options.Get(uint32(1))
+	secondEntry := rawSecondEntry.(*SSHOption)
+
+	if !(secondEntry.Value == "PasswordAuthentication yes" &&
+		secondEntry.LocationRange.Start.Line == 1 &&
+		secondEntry.LocationRange.End.Line == 1 &&
+		secondEntry.LocationRange.Start.Character == 0 &&
+		secondEntry.LocationRange.End.Character == 26 &&
+		secondEntry.Key.Value == "PasswordAuthentication" &&
+		secondEntry.Key.LocationRange.Start.Character == 0 &&
+		secondEntry.Key.LocationRange.End.Character == 22 &&
+		secondEntry.OptionValue.Value == "yes" &&
+		secondEntry.OptionValue.LocationRange.Start.Character == 23 &&
+		secondEntry.OptionValue.LocationRange.End.Character == 26) {
+		t.Errorf("Expected second entry to be PasswordAuthentication yes, but got: %v", secondEntry)
+	}
+}