diff --git a/LibOS/shim/test/regression/mmap_file.c b/LibOS/shim/test/regression/mmap_file.c
index 3d869a6418..9840594977 100644
--- a/LibOS/shim/test/regression/mmap_file.c
+++ b/LibOS/shim/test/regression/mmap_file.c
@@ -89,10 +89,5 @@ int main(int argc, const char** argv) {
     __asm__ volatile("nop" ::: "memory");
     a[page_size] = 0xff;
 
-    if (signal(SIGBUS, SIG_DFL) == SIG_ERR) {
-        perror("signal");
-        return 1;
-    }
-
     return 0;
 }
diff --git a/LibOS/shim/test/regression/test_libos.py b/LibOS/shim/test/regression/test_libos.py
index 8c2e0993c7..19a5aa5aee 100644
--- a/LibOS/shim/test/regression/test_libos.py
+++ b/LibOS/shim/test/regression/test_libos.py
@@ -396,7 +396,10 @@ def test_043_futex_wake_op(self):
 
         self.assertIn('Test successful!', stdout)
 
-    def test_050_mmap(self):
+    @unittest.skipIf(HAS_SGX,
+        'On SGX, SIGBUS isn\'t always implemented correctly, for lack '
+        'of memory protection. For now, some of these cases won\'t work.')
+    def test_051_mmap_sgx(self):
         stdout, _ = self.run_binary(['mmap_file'], timeout=60)
 
         # Private mmap beyond file range
@@ -409,14 +412,6 @@ def test_050_mmap(self):
         self.assertIn('mmap test 3 passed', stdout)
         self.assertIn('mmap test 4 passed', stdout)
 
-        # "test 5" and "test 8" are checked below, in test_051_mmap_sgx
-
-    @unittest.skipIf(HAS_SGX,
-        'On SGX, SIGBUS isn\'t always implemented correctly, for lack '
-        'of memory protection. For now, some of these cases won\'t work.')
-    def test_051_mmap_sgx(self):
-        stdout, _ = self.run_binary(['mmap_file'], timeout=60)
-
         # SIGBUS test
         self.assertIn('mmap test 5 passed', stdout)
         self.assertIn('mmap test 8 passed', stdout)