diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 132052f50c59eba73468b0f4a736f52c08b68a35..234e13b52b10bd3d0cb985f1c5ecf0a14a7b2165 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -481,7 +481,7 @@ if platform.system() == 'Windows':
       jobset.JobSpec(['vsprojects\\build.bat', 
                       'vsprojects\\%s.sln' % target, 
                       '/p:Configuration=%s' % _WINDOWS_CONFIG[cfg]],
-                      shell=True, timeout_seconds=30*60)
+                      shell=True, timeout_seconds=90*60)
       for target in targets]
 else:
   def make_jobspec(cfg, targets):