diff --git a/testdata/lvs/inv.cir b/testdata/lvs/inv.cir
new file mode 100644
index 000000000..d6098ad10
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+++ b/testdata/lvs/inv.cir
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+
+* Simple CMOS inverer circuit 
+
+.SUBCKT INVERTER VSS IN OUT NWELL SUBSTRATE VDD 
+Mp VDD IN OUT NWELL PMOS W=1.5U L=0.25U
+Mn OUT IN VSS SUBSTRATE NMOS W=0.9U L=0.25U
+.ENDS
+