2 files changed, 5 insertions, 0 deletions
diff --git a/ext/strscan/strscan.c b/ext/strscan/strscan.c
index db87818b44..0eb51e772e 100644
--- a/ext/strscan/strscan.c
+++ b/ext/strscan/strscan.c
@@ -1571,6 +1571,10 @@ strscan_fixed_anchor_p(VALUE self)
 void
 Init_strscan(void)
 {
+#ifdef HAVE_RB_EXT_RACTOR_SAFE
+    rb_ext_ractor_safe(true);
+#endif
+
 #undef rb_intern
     ID id_scanerr = rb_intern("ScanError");
     VALUE tmp;
diff --git a/ext/strscan/strscan.gemspec b/ext/strscan/strscan.gemspec
index 61c28a492d..734d43939f 100644
--- a/ext/strscan/strscan.gemspec
+++ b/ext/strscan/strscan.gemspec
@@ -17,4 +17,5 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency "rake-compiler"
   s.add_development_dependency "benchmark-driver"
+  s.add_development_dependency "test-unit"
 end