diff --git a/test/framework/toolchain.py b/test/framework/toolchain.py
index 15b99a8f3f..b91798a7ee 100644
--- a/test/framework/toolchain.py
+++ b/test/framework/toolchain.py
@@ -787,10 +787,18 @@ def test_compiler_dependent_optarch(self):
             optarch_var['Intel'] = intel_flags
             optarch_var['GCC'] = gcc_flags
             optarch_var['GCCcore'] = gcccore_flags
+
+            # Save current tmp dir
+            old_vars = {name: os.environ.get(name) for name in ('TMPDIR', 'TEMP', 'TMP')}
+
             init_config(build_options={'optarch': optarch_var, 'silent': True})
             tc = self.get_toolchain(toolchain_name, version=toolchain_ver)
             tc.set_options({'optarch': enable})
             tc.prepare()
+
+            # Restore tmp dir
+            os.environ.update(old_vars)
+
             flags = None
             if toolchain_name == 'iccifort':
                 flags = intel_flags_exp