Apply patch from Duy Nguyen.

arthurgleckler · arthurgleckler · commit 7c4ac040c35b · 2019-10-06T10:22:23.000-07:00
Permission granted by the author, Linus Björnstam.
diff --git a/tests-r7rs.scm b/tests-r7rs.scm
@@ -4,6 +4,7 @@
 (import (scheme base)
         (scheme char)
         (scheme list)
+	(scheme read)
         (srfi 171))
 (cond-expand
  (gauche (import (only (gauche base) compose)
