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+These tests are "native" to Tvix and exist in addition to the Nix test
+suite.
+
+All of these are straightforward code snippets which are expected to
+produce a certain result.
+
+# `identity-*` tests
+
+Files named `identity-*.nix` contain code that is supposed to produce
+itself exactly after evaluation.
+
+These are useful for testing literals.
+
+# `eval-okay-*` tests
+
+Files named `eval-okay-*.nix` contain code which is supposed to
+evaluate to the output in the corresponding `eval-okay-*.exp` file.
+
+This convention is taken from the original Nix test suite.