diff --git a/isa/rv64mi/mcsr.S b/isa/rv64mi/mcsr.S
index 03cf29a..729889f 100644
--- a/isa/rv64mi/mcsr.S
+++ b/isa/rv64mi/mcsr.S
@@ -21,7 +21,11 @@ RVTEST_CODE_BEGIN
 #endif
 
   # Check that mhartid reports 0
-  TEST_CASE(3, a0, 0x0, csrr a0, mhartid)
+  # TEST_CASE(3, a0, 0x0, csrr a0, mhartid)
+  # For Kelvin, just check that the CSR doosen't cause an exception.
+  # Depending on how the core is instantiated, this may have
+  # differing values.
+  csrr a0, mhartid
 
   # Check that reading the following CSRs doesn't cause an exception
   csrr a0, mimpid