diff --git a/cmd/scw-qa/main.go b/cmd/scw-qa/main.go
index 182ef4c803..fbb7e70827 100644
--- a/cmd/scw-qa/main.go
+++ b/cmd/scw-qa/main.go
@@ -2,26 +2,34 @@ package main
 
 import (
 	"fmt"
+	"os"
+	"strings"
 
+	"github.com/fatih/color"
 	"github.com/scaleway/scaleway-cli/internal/namespaces"
 	"github.com/scaleway/scaleway-cli/internal/qa"
+	"github.com/scaleway/scaleway-cli/internal/tabwriter"
+	"github.com/scaleway/scaleway-cli/internal/terminal"
 )
 
 func main() {
 	commands := namespaces.GetCommands()
 	errors := qa.LintCommands(commands)
 
-	errorCounts := map[string]int{}
+	fmt.Println(terminal.Style("Errors:", color.Bold))
 	for _, err := range errors {
-		errorCounts[fmt.Sprintf("%T", err)]++
+		fmt.Printf("%v\n", err)
 	}
 
-	fmt.Printf("Errors:\n")
+	errorCounts := map[string]int{}
 	for _, err := range errors {
-		fmt.Printf("%v\n", err)
+		errorCounts[fmt.Sprintf("%T", err)]++
 	}
-	fmt.Printf("\nSummary:\n")
+
+	fmt.Println(terminal.Style("\nSummary:", color.Bold))
+	w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
 	for key, count := range errorCounts {
-		fmt.Printf("%s: %d\n", key, count)
+		_, _ = fmt.Fprintf(w, "%s\t%d\n", strings.TrimPrefix(key, "*qa."), count)
 	}
+	_ = w.Flush()
 }
diff --git a/internal/qa/qa.go b/internal/qa/qa.go
index f4cc9430eb..137eb02693 100644
--- a/internal/qa/qa.go
+++ b/internal/qa/qa.go
@@ -16,6 +16,7 @@ func LintCommands(commands *core.Commands) []interface{} {
 	errors = append(errors, testPositionalArgMustBeRequiredError(commands)...)
 	errors = append(errors, testExampleCanHaveOnlyOneTypeOfExampleError(commands)...)
 	errors = append(errors, testDifferentLocalizationForNamespaceError(commands)...)
+	errors = append(errors, testDuplicatedCommandError(commands)...)
 	return errors
 }
 
@@ -140,7 +141,7 @@ type DifferentLocalizationForNamespaceError struct {
 }
 
 func (err DifferentLocalizationForNamespaceError) Error() string {
-	return fmt.Sprintf("different localization for '%v', '%v': %v, %v",
+	return fmt.Sprintf("different localization for commands '%v', '%v': %v, %v",
 		err.Command1.GetCommandLine(), err.Command2.GetCommandLine(), err.ArgNames1, err.ArgNames2)
 }
 
@@ -208,3 +209,30 @@ func testDifferentLocalizationForNamespaceError(commands *core.Commands) []inter
 	}
 	return errors
 }
+
+type DuplicatedCommandError struct {
+	Command *core.Command
+}
+
+func (err DuplicatedCommandError) Error() string {
+	return fmt.Sprintf("duplicated command '%s'", err.Command.GetCommandLine())
+}
+
+// testDuplicatedCommandError testes that there is no duplicate command.
+func testDuplicatedCommandError(commands *core.Commands) []interface{} {
+	errors := []interface{}(nil)
+	uniqueness := make(map[string]bool)
+
+	for _, command := range commands.GetAll() {
+		key := command.GetCommandLine()
+
+		if uniqueness[key] {
+			errors = append(errors, &DuplicatedCommandError{Command: command})
+			continue
+		}
+
+		uniqueness[key] = true
+	}
+
+	return errors
+}