diff --git a/core/tests/regression_tests.rs b/core/tests/regression_tests.rs
index a5ce3e1ac42a..519157ac9572 100644
--- a/core/tests/regression_tests.rs
+++ b/core/tests/regression_tests.rs
@@ -231,6 +231,7 @@ swf_tests! {
     #[ignore] (watch_virtual_property, "avm1/watch_virtual_property", 1),
     (cross_movie_root, "avm1/cross_movie_root", 5),
     (roots_and_levels, "avm1/roots_and_levels", 1),
+    (swf5_encoding, "avm1/swf5_encoding", 1),
     (swf6_case_insensitive, "avm1/swf6_case_insensitive", 1),
     (swf7_case_sensitive, "avm1/swf7_case_sensitive", 1),
     (prototype_enumerate, "avm1/prototype_enumerate", 1),
diff --git a/core/tests/swfs/avm1/swf5_encoding/output.txt b/core/tests/swfs/avm1/swf5_encoding/output.txt
new file mode 100644
index 000000000000..7b3c7c179b5a
--- /dev/null
+++ b/core/tests/swfs/avm1/swf5_encoding/output.txt
@@ -0,0 +1,3 @@
+// string:
+9
+testÅtest
diff --git a/core/tests/swfs/avm1/swf5_encoding/test.fla b/core/tests/swfs/avm1/swf5_encoding/test.fla
new file mode 100644
index 000000000000..27715760c05b
Binary files /dev/null and b/core/tests/swfs/avm1/swf5_encoding/test.fla differ
diff --git a/core/tests/swfs/avm1/swf5_encoding/test.swf b/core/tests/swfs/avm1/swf5_encoding/test.swf
new file mode 100644
index 000000000000..48719d47f787
Binary files /dev/null and b/core/tests/swfs/avm1/swf5_encoding/test.swf differ