diff --git a/tests/user_test.go b/tests/user_test.go
new file mode 100644
index 000000000..a8b5602c8
--- /dev/null
+++ b/tests/user_test.go
@@ -0,0 +1,33 @@
+package cache
+
+import (
+	"testing"
+	"reflect"
+)
+
+func TestRemoveRepeatedElementsInList(t *testing.T) {
+	testCases := []struct {
+		input    []string
+		expected []string
+	}{
+		{
+			input:    []string{},
+			expected: []string{},
+		},
+		{
+			input:    []string{"a", "b", "c"},
+			expected: []string{"a", "b", "c"},
+		},
+		{
+			input:    []string{"a", "a", "b", "b", "c", "c"},
+			expected: []string{"a", "b", "c"},
+		},
+	}
+
+	for _, testCase := range testCases {
+		result := RemoveRepeatedElementsInList(testCase.input)
+		if !reflect.DeepEqual(result, testCase.expected) {
+			t.Errorf("RemoveRepeatedElementsInList(%v) = %v; want %v", testCase.input, result, testCase.expected)
+		}
+	}
+}