diff --git a/flang/test/Semantics/OpenMP/sections01.f90 b/flang/test/Semantics/OpenMP/sections01.f90
index 00b5a6d8fbc4c..c26cc88dcc7af 100644
--- a/flang/test/Semantics/OpenMP/sections01.f90
+++ b/flang/test/Semantics/OpenMP/sections01.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %python %S/../test_errors.py %s %flang -fopenmp
 
 ! OpenMP Version 4.5
diff --git a/flang/test/Semantics/OpenMP/sections02.f90 b/flang/test/Semantics/OpenMP/sections02.f90
index 912e7bc2a8ff9..ee29922a72c08 100644
--- a/flang/test/Semantics/OpenMP/sections02.f90
+++ b/flang/test/Semantics/OpenMP/sections02.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! REQUIRES: openmp_runtime
 
 ! RUN: %python %S/../test_errors.py %s %flang %openmp_flags
diff --git a/flang/test/Semantics/OpenMP/simd-aligned.f90 b/flang/test/Semantics/OpenMP/simd-aligned.f90
index 3ffdc68693fd9..0a9f95833e22e 100644
--- a/flang/test/Semantics/OpenMP/simd-aligned.f90
+++ b/flang/test/Semantics/OpenMP/simd-aligned.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %python %S/../test_errors.py %s %flang -fopenmp
 
 ! OpenMP Version 4.5
diff --git a/flang/test/Semantics/OpenMP/simd-nontemporal.f90 b/flang/test/Semantics/OpenMP/simd-nontemporal.f90
index 074b0a2039edc..a488edd98cdc3 100644
--- a/flang/test/Semantics/OpenMP/simd-nontemporal.f90
+++ b/flang/test/Semantics/OpenMP/simd-nontemporal.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %python %S/../test_errors.py %s %flang -fopenmp
 
 ! OpenMP Version 4.5
diff --git a/flang/test/Semantics/OpenMP/taskloop01.f90 b/flang/test/Semantics/OpenMP/taskloop01.f90
index 2c53759494048..6bef584381518 100644
--- a/flang/test/Semantics/OpenMP/taskloop01.f90
+++ b/flang/test/Semantics/OpenMP/taskloop01.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %python %S/../test_errors.py %s %flang -fopenmp
 ! OpenMP Version 4.5
 ! 2.9.2 taskloop Construct
diff --git a/flang/test/Semantics/OpenMP/taskloop02.f90 b/flang/test/Semantics/OpenMP/taskloop02.f90
index 275b079d38a1e..867ef8a9806d9 100644
--- a/flang/test/Semantics/OpenMP/taskloop02.f90
+++ b/flang/test/Semantics/OpenMP/taskloop02.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: not %flang -fsyntax-only -fopenmp %s 2>&1 | FileCheck %s
 ! OpenMP Version 4.5
 ! 2.9.2 taskloop Construct
diff --git a/flang/test/Semantics/OpenMP/taskwait.f90 b/flang/test/Semantics/OpenMP/taskwait.f90
index a3b15c7a1df0a..e60051c9da8ac 100644
--- a/flang/test/Semantics/OpenMP/taskwait.f90
+++ b/flang/test/Semantics/OpenMP/taskwait.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %python %S/../test_errors.py %s %flang -fopenmp
 
 !$omp taskwait
diff --git a/flang/test/Semantics/OpenMP/use_device_addr.f90 b/flang/test/Semantics/OpenMP/use_device_addr.f90
index dda00d5105043..93a7643b5eb48 100644
--- a/flang/test/Semantics/OpenMP/use_device_addr.f90
+++ b/flang/test/Semantics/OpenMP/use_device_addr.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %flang_fc1 -fopenmp -fdebug-dump-symbols %s | FileCheck %s
 ! OpenMP Version 5.1
 ! 2.14.2 use_device_addr clause
diff --git a/flang/test/Semantics/OpenMP/use_device_addr1.f90 b/flang/test/Semantics/OpenMP/use_device_addr1.f90
index c37e9a3a7e3ee..867e324b68ad9 100644
--- a/flang/test/Semantics/OpenMP/use_device_addr1.f90
+++ b/flang/test/Semantics/OpenMP/use_device_addr1.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %python %S/../test_errors.py %s %flang_fc1 -fopenmp
 ! OpenMP Version 5.0
 ! 2.10.1 use_device_ptr clause
diff --git a/flang/test/Semantics/OpenMP/use_device_ptr.f90 b/flang/test/Semantics/OpenMP/use_device_ptr.f90
index e9e7fbb6c1f5b..64b98cf67961d 100644
--- a/flang/test/Semantics/OpenMP/use_device_ptr.f90
+++ b/flang/test/Semantics/OpenMP/use_device_ptr.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %flang_fc1 -fopenmp -fdebug-dump-symbols %s | FileCheck %s
 ! OpenMP Version 5.0
 ! 2.10.1 use_device_ptr clause
diff --git a/flang/test/Semantics/OpenMP/use_device_ptr1.f90 b/flang/test/Semantics/OpenMP/use_device_ptr1.f90
index f705c50370dae..176fb5f35a849 100644
--- a/flang/test/Semantics/OpenMP/use_device_ptr1.f90
+++ b/flang/test/Semantics/OpenMP/use_device_ptr1.f90
@@ -1,5 +1,3 @@
-! UNSUPPORTED: system-windows
-! Marking as unsupported due to suspected long runtime on Windows
 ! RUN: %python %S/../test_errors.py %s %flang_fc1 -fopenmp
 ! OpenMP Version 5.0
 ! 2.10.1 use_device_ptr clause