diff --git a/Project.toml b/Project.toml
index 990c163..793cdb9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -7,6 +7,7 @@ julia = "1"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
 [targets]
-test = ["Test"]
+test = ["Test", "REPL"]
diff --git a/test/runtests.jl b/test/runtests.jl
index 29b61a3..1187b34 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,5 +1,6 @@
 using StructIO
 using Test
+import REPL # needed for docstrings on nightly: julia#55438
 
 # First, exercise the `@io` macro a bit, to ensure it can handle different
 # kinds of type declarations