diff --git a/zcldec/spec_test.go b/zcldec/spec_test.go
new file mode 100644
index 0000000..c3abed5
--- /dev/null
+++ b/zcldec/spec_test.go
@@ -0,0 +1,13 @@
+package zcldec
+
+// Verify that all of our spec types implement the necessary interfaces
+var objectSpecAsSpec Spec = ObjectSpec(nil)
+var tupleSpecAsSpec Spec = TupleSpec(nil)
+var attrSpecAsSpec Spec = (*AttrSpec)(nil)
+var literalSpecAsSpec Spec = (*LiteralSpec)(nil)
+var exprSpecAsSpec Spec = (*ExprSpec)(nil)
+var blockSpecAsSpec Spec = (*BlockSpec)(nil)
+var blockListSpecAsSpec Spec = (*BlockListSpec)(nil)
+var blockSetSpecAsSpec Spec = (*BlockSetSpec)(nil)
+var blockMapSpecAsSpec Spec = (*BlockMapSpec)(nil)
+var blockLabelSpecAsSpec Spec = (*BlockLabelSpec)(nil)