diff --git a/test/sim/sw_testcases/csr_id.c b/test/sim/sw_testcases/csr_id.c
new file mode 100644
index 0000000..0d0ccab
--- /dev/null
+++ b/test/sim/sw_testcases/csr_id.c
@@ -0,0 +1,21 @@
+#include "tb_cxxrtl_io.h"
+#include "hazard3_csr.h"
+
+// This is a new CSR for priv-1.12. Most compilers (maybe binutils?) don't know about it.
+#define mconfigptr 0xf15
+
+int main() {
+	// Expected value: 32'hdeadbeef, set in tb Makefile
+	tb_printf("mvendorid:  %08x\n", read_csr(mvendorid ));
+	// Expected value: 27, the registered ID for Hazard3
+	tb_printf("marchid:    %08x\n", read_csr(marchid   ));
+	// Expected value: 32'h12345678, set in tb Makefile
+	tb_printf("mimpid:     %08x\n", read_csr(mimpid    ));
+	// Expected value: 0
+	tb_printf("mhartid:    %08x\n", read_csr(mhartid   ));
+	// Expected value: 32'h9abcdef0, set in tb Makefile
+	tb_printf("mconfigptr: %08x\n", read_csr(mconfigptr));
+	// Expected value: 40801105, RV32I + A C M X
+	tb_printf("misa:       %08x\n", read_csr(misa      ));
+	return 0;
+}
diff --git a/test/sim/sw_testcases/csr_id.expected_output b/test/sim/sw_testcases/csr_id.expected_output
new file mode 100644
index 0000000..783037e
--- /dev/null
+++ b/test/sim/sw_testcases/csr_id.expected_output
@@ -0,0 +1,6 @@
+mvendorid:  deadbeef
+marchid:    0000001b
+mimpid:     12345678
+mhartid:    00000000
+mconfigptr: 9abcdef0
+misa:       40801105
diff --git a/test/sim/tb_cxxrtl/Makefile b/test/sim/tb_cxxrtl/Makefile
index abdfd14..fa15e2c 100644
--- a/test/sim/tb_cxxrtl/Makefile
+++ b/test/sim/tb_cxxrtl/Makefile
@@ -15,6 +15,10 @@ MUL_FAST         := 1
 MULH_FAST        := 1
 REDUCED_BYPASS   := 0
 
+MVENDORID_VAL    := 32'hdeadbeef
+MIMPID_VAL       := 32'h12345678
+MCONFIGPTR_VAL   := 32'h9abcdef0
+
 .PHONY: clean all
 
 all: tb
@@ -33,6 +37,9 @@ SYNTH_CMD += chparam -set REDUCED_BYPASS $(REDUCED_BYPASS) $(TOP);
 SYNTH_CMD += chparam -set MULDIV_UNROLL $(MULDIV_UNROLL) $(TOP);
 SYNTH_CMD += chparam -set MUL_FAST $(MUL_FAST) $(TOP);
 SYNTH_CMD += chparam -set MULH_FAST $(MULH_FAST) $(TOP);
+SYNTH_CMD += chparam -set MVENDORID_VAL $(MVENDORID_VAL) $(TOP);
+SYNTH_CMD += chparam -set MIMPID_VAL $(MIMPID_VAL) $(TOP);
+SYNTH_CMD += chparam -set MCONFIGPTR_VAL $(MCONFIGPTR_VAL) $(TOP);
 SYNTH_CMD += hierarchy -top $(TOP);
 SYNTH_CMD += write_cxxrtl dut.cpp