+
+# Testing skeleton support.
+m4_include([skeletons.at])
+
+# Testing the part of the engine that computes FOLLOW etc.
+m4_include([sets.at])
+
+# Testing grammar reduction.
+m4_include([reduce.at])
+
+# Testing conflicts detection and resolution.
+m4_include([conflicts.at])
+
+# Testing that #lines are correct.
+m4_include([synclines.at])
+
+# Testing that headers are sane.
+m4_include([headers.at])
+
+# Testing that user actions are properly performed.
+m4_include([actions.at])
+
+# Testing semantic types support.
+m4_include([types.at])
+
+# Fulling testing (compilation and execution of the parser) on calc.