diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
@@ -50,16 +50,6 @@
 
         ns = self.namespace
 
-        if self.expectedCompiler(["clang"]) and self.expectedCompilerVersion(
-            [">", "16.0"]
-        ):
-            expected_basic_string = "%s::basic_string<unsigned char>" % ns
-        else:
-            expected_basic_string = (
-                "%s::basic_string<unsigned char, %s::char_traits<unsigned char>, "
-                "%s::allocator<unsigned char> >" % (ns, ns, ns)
-            )
-
         self.expect(
             "frame variable",
             substrs=[
@@ -81,7 +71,6 @@
                 '(%s::u32string) u32_string = U"🍄🍅🍆🍌"' % ns,
                 # FIXME: This should have a 'U' prefix.
                 '(%s::u32string) u32_empty = ""' % ns,
-                '(%s) uchar = "aaaaa"' % expected_basic_string,
                 "(%s::string *) null_str = nullptr" % ns,
             ],
         )
@@ -126,7 +115,6 @@
                 '(%s::u16string) u16_string = u"ß水氶"' % ns,
                 '(%s::u32string) u32_string = U"🍄🍅🍆🍌"' % ns,
                 '(%s::u32string) u32_empty = ""' % ns,
-                '(%s) uchar = "aaaaa"' % expected_basic_string,
                 "(%s::string *) null_str = nullptr" % ns,
             ],
         )
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/main.cpp b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/main.cpp
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/main.cpp
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/main.cpp
@@ -113,7 +113,6 @@
     std::u16string u16_empty(u"");
     std::u32string u32_string(U"🍄🍅🍆🍌");
     std::u32string u32_empty(U"");
-    std::basic_string<unsigned char> uchar(5, 'a');
     std::string *null_str = nullptr;
 
     std::string garbage1, garbage2, garbage3, garbage4, garbage5;
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
@@ -60,15 +60,6 @@
         # Execute the cleanup function during test case tear down.
         self.addTearDownHook(cleanup)
 
-        if self.expectedCompiler(["clang"]) and self.expectedCompilerVersion(
-            [">", "16.0"]
-        ):
-            expected_basic_string = "std::basic_string<unsigned char>"
-            expected_basic_string_view = "std::basic_string_view<unsigned char>"
-        else:
-            expected_basic_string = "std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >"
-            expected_basic_string_view = "std::basic_string_view<unsigned char, std::char_traits<unsigned char> >"
-
         self.expect_var_path("wempty", type="std::wstring_view", summary='L""')
         self.expect_var_path(
             "s", type="std::wstring_view", summary='L"hello world! מזל טוב!"'
@@ -96,12 +87,6 @@
             "u32_string", type="std::u32string_view", summary='U"🍄🍅🍆🍌"'
         )
         self.expect_var_path("u32_empty", type="std::u32string_view", summary='""')
-        self.expect_var_path(
-            "uchar_source", type=expected_basic_string, summary='"aaaaaaaaaa"'
-        )
-        self.expect_var_path(
-            "uchar", type=expected_basic_string_view, summary='"aaaaa"'
-        )
         self.expect_var_path(
             "oops", type="std::string_view", summary='"Hellooo World\\n"'
         )
@@ -166,12 +151,6 @@
             "u32_string", type="std::u32string_view", summary='U"🍄🍅🍆🍌"'
         )
         self.expect_var_path("u32_empty", type="std::u32string_view", summary='""')
-        self.expect_var_path(
-            "uchar_source", type=expected_basic_string, summary='"aaaaaaaaaa"'
-        )
-        self.expect_var_path(
-            "uchar", type=expected_basic_string_view, summary='"aaaaa"'
-        )
 
         self.runCmd("cont")
         self.expect(
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/main.cpp b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/main.cpp
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/main.cpp
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/main.cpp
@@ -92,8 +92,6 @@
   std::u16string_view u16_empty(u"");
   std::u32string_view u32_string(U"🍄🍅🍆🍌");
   std::u32string_view u32_empty(U"");
-  std::basic_string<unsigned char> uchar_source(10, 'a');
-  std::basic_string_view<unsigned char> uchar(uchar_source.data(), 5);
   std::string_view *null_str = nullptr;
 
   std::string hello = "Hellooo ";
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py
@@ -61,8 +61,6 @@
         var_pq = self.frame().FindVariable("pq")
         var_pQ = self.frame().FindVariable("pQ")
 
-        var_uchar = self.frame().FindVariable("uchar")
-
         self.assertEqual(var_wempty.GetSummary(), 'L""', "wempty summary wrong")
         self.assertEqual(
             var_s.GetSummary(), 'L"hello world! מזל טוב!"', "s summary wrong"
@@ -78,7 +76,6 @@
             '"quite a long std::strin with lots of info inside it"',
             "Q summary wrong",
         )
-        self.assertEqual(var_uchar.GetSummary(), '"aaaaa"', "u summary wrong")
         self.assertEqual(var_rq.GetSummary(), '"hello world"', "rq summary wrong")
         self.assertEqual(
             var_rQ.GetSummary(),
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/main.cpp b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/main.cpp
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/main.cpp
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/main.cpp
@@ -9,7 +9,6 @@
     std::string empty("");
     std::string q("hello world");
     std::string Q("quite a long std::strin with lots of info inside it");
-    std::basic_string<unsigned char> uchar(5, 'a');
     auto &rq = q, &rQ = Q;
     std::string *pq = &q, *pQ = &Q;
     S.assign(L"!!!!!"); // Set break point at this line.