diff --git a/test/testsimplifyusing.cpp b/test/testsimplifyusing.cpp
index 5978401c0c6..bfdf8b9a1d1 100644
--- a/test/testsimplifyusing.cpp
+++ b/test/testsimplifyusing.cpp
@@ -684,22 +684,22 @@ class TestSimplifyUsing : public TestFixture {
     }
 
     void simplifyUsing30() {
-        //{
-        //    const char code[] = "using std::to_string;\n" // #8454
-        //                        "void f() {\n"
-        //                        "    std::string str = to_string(1);\n"
-        //                        "}\n";
-        //    const char expected[] = "void f ( ) { std :: string str ; str = std :: to_string ( 1 ) ; }";
-        //    ASSERT_EQUALS(expected, tok(code, Platform::Type::Native, /*debugwarnings*/ true));
-        //    ASSERT_EQUALS("", errout.str());
-        //}
-        //{
-        //    const char code[] = "using std::cout, std::endl, std::cerr, std::ostringstream;\n"
-        //                        "cerr << \"abc\";\n";
-        //    const char expected[] = "std :: cerr << \"abc\" ;";
-        //    ASSERT_EQUALS(expected, tok(code, Platform::Type::Native, /*debugwarnings*/ true));
-        //    ASSERT_EQUALS("", errout.str());
-        //}
+        {
+            const char code[] = "using std::to_string;\n" // #8454
+                                "void f() {\n"
+                                "    std::string str = to_string(1);\n"
+                                "}\n";
+            const char expected[] = "void f ( ) { std :: string str ; str = std :: to_string ( 1 ) ; }";
+            ASSERT_EQUALS(expected, tok(code, Platform::Type::Native, /*debugwarnings*/ true));
+            ASSERT_EQUALS("", errout.str());
+        }
+        {
+            const char code[] = "using std::cout, std::endl, std::cerr, std::ostringstream;\n"
+                                "cerr << \"abc\";\n";
+            const char expected[] = "std :: cerr << \"abc\" ;";
+            ASSERT_EQUALS(expected, tok(code, Platform::Type::Native, /*debugwarnings*/ true));
+            ASSERT_EQUALS("", errout.str());
+        }
         {
             const char code[] = "using std::string_view_literals::operator\"\"sv;\n";
             const char expected[] = "using std :: string_view_literals :: operator\"\"sv ;";