diff --git a/libcxx/test/libcxx/iterators/predef.iterators/reverse.iterators/bad_template_argument.verify.cpp b/libcxx/test/libcxx/iterators/predef.iterators/reverse.iterators/bad_template_argument.verify.cpp
--- a/libcxx/test/libcxx/iterators/predef.iterators/reverse.iterators/bad_template_argument.verify.cpp
+++ b/libcxx/test/libcxx/iterators/predef.iterators/reverse.iterators/bad_template_argument.verify.cpp
@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
-// UNSUPPORTED: libcpp-no-concepts
 
 // <iterator>
 
diff --git a/libcxx/test/std/algorithms/alg.sorting/alg.min.max/ranges.min.pass.cpp b/libcxx/test/std/algorithms/alg.sorting/alg.min.max/ranges.min.pass.cpp
--- a/libcxx/test/std/algorithms/alg.sorting/alg.min.max/ranges.min.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.sorting/alg.min.max/ranges.min.pass.cpp
@@ -9,7 +9,6 @@
 // <algorithm>
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
-// UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T, class Proj = identity,
diff --git a/libcxx/test/std/iterators/predef.iterators/reverse.iterators/reverse.iter.cmp/sfinae.compile.pass.cpp b/libcxx/test/std/iterators/predef.iterators/reverse.iterators/reverse.iter.cmp/sfinae.compile.pass.cpp
--- a/libcxx/test/std/iterators/predef.iterators/reverse.iterators/reverse.iter.cmp/sfinae.compile.pass.cpp
+++ b/libcxx/test/std/iterators/predef.iterators/reverse.iterators/reverse.iter.cmp/sfinae.compile.pass.cpp
@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
-// UNSUPPORTED: libcpp-no-concepts
 
 // <iterator>
 //
diff --git a/libcxx/test/std/iterators/predef.iterators/reverse.iterators/sized_sentinel.compile.pass.cpp b/libcxx/test/std/iterators/predef.iterators/reverse.iterators/sized_sentinel.compile.pass.cpp
--- a/libcxx/test/std/iterators/predef.iterators/reverse.iterators/sized_sentinel.compile.pass.cpp
+++ b/libcxx/test/std/iterators/predef.iterators/reverse.iterators/sized_sentinel.compile.pass.cpp
@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
-// UNSUPPORTED: libcpp-no-concepts
 
 // reverse_iterator