diff --git a/tests/tests/external_interface/mod.rs b/tests/tests/external_interface/mod.rs
new file mode 100644
index 000000000..30ef41d3f
--- /dev/null
+++ b/tests/tests/external_interface/mod.rs
@@ -0,0 +1,52 @@
+use ruffle_core::context::UpdateContext;
+use ruffle_core::external::Value as ExternalValue;
+use ruffle_core::external::{ExternalInterfaceMethod, ExternalInterfaceProvider};
+
+#[derive(Default)]
+pub struct ExternalInterfaceTestProvider {}
+
+impl ExternalInterfaceTestProvider {
+    pub fn new() -> Self {
+        Default::default()
+    }
+}
+
+fn do_trace(context: &mut UpdateContext<'_, '_>, args: &[ExternalValue]) -> ExternalValue {
+    context.avm_trace(&format!("[ExternalInterface] trace: {args:?}"));
+    "Traced!".into()
+}
+
+fn do_ping(context: &mut UpdateContext<'_, '_>, _args: &[ExternalValue]) -> ExternalValue {
+    context.avm_trace("[ExternalInterface] ping");
+    "Pong!".into()
+}
+
+fn do_reentry(context: &mut UpdateContext<'_, '_>, _args: &[ExternalValue]) -> ExternalValue {
+    context.avm_trace("[ExternalInterface] starting reentry");
+    if let Some(callback) = context.external_interface.get_callback("callWith") {
+        callback.call(
+            context,
+            "callWith",
+            vec!["trace".into(), "successful reentry!".into()],
+        )
+    } else {
+        ExternalValue::Null
+    }
+}
+
+impl ExternalInterfaceProvider for ExternalInterfaceTestProvider {
+    fn get_method(&self, name: &str) -> Option<Box<dyn ExternalInterfaceMethod>> {
+        match name {
+            "trace" => Some(Box::new(do_trace)),
+            "ping" => Some(Box::new(do_ping)),
+            "reentry" => Some(Box::new(do_reentry)),
+            _ => None,
+        }
+    }
+
+    fn on_callback_available(&self, _name: &str) {}
+
+    fn on_fs_command(&self, _command: &str, _args: &str) -> bool {
+        false
+    }
+}
diff --git a/tests/tests/regression_tests.rs b/tests/tests/regression_tests.rs
index 5b38ee751..7197e18fd 100644
--- a/tests/tests/regression_tests.rs
+++ b/tests/tests/regression_tests.rs
@@ -6,10 +6,9 @@ use ruffle_core::backend::{
     log::LogBackend,
     storage::{MemoryStorageBackend, StorageBackend},
 };
-use ruffle_core::context::UpdateContext;
 use ruffle_core::external::Value as ExternalValue;
-use ruffle_core::external::{ExternalInterfaceMethod, ExternalInterfaceProvider};
 
+use crate::external_interface::ExternalInterfaceTestProvider;
 use crate::util::runner::test_swf_with_hooks;
 use anyhow::Context;
 use anyhow::Result;
@@ -24,6 +23,7 @@ use std::path::Path;
 use std::rc::Rc;
 use util::test::Test;
 
+mod external_interface;
 mod util;
 
 const RUN_IMG_TESTS: bool = cfg!(feature = "imgtests");
@@ -256,55 +256,6 @@ impl LogBackend for TestLogBackend {
     }
 }
 
-#[derive(Default)]
-pub struct ExternalInterfaceTestProvider {}
-
-impl ExternalInterfaceTestProvider {
-    pub fn new() -> Self {
-        Default::default()
-    }
-}
-
-fn do_trace(context: &mut UpdateContext<'_, '_>, args: &[ExternalValue]) -> ExternalValue {
-    context.avm_trace(&format!("[ExternalInterface] trace: {args:?}"));
-    "Traced!".into()
-}
-
-fn do_ping(context: &mut UpdateContext<'_, '_>, _args: &[ExternalValue]) -> ExternalValue {
-    context.avm_trace("[ExternalInterface] ping");
-    "Pong!".into()
-}
-
-fn do_reentry(context: &mut UpdateContext<'_, '_>, _args: &[ExternalValue]) -> ExternalValue {
-    context.avm_trace("[ExternalInterface] starting reentry");
-    if let Some(callback) = context.external_interface.get_callback("callWith") {
-        callback.call(
-            context,
-            "callWith",
-            vec!["trace".into(), "successful reentry!".into()],
-        )
-    } else {
-        ExternalValue::Null
-    }
-}
-
-impl ExternalInterfaceProvider for ExternalInterfaceTestProvider {
-    fn get_method(&self, name: &str) -> Option<Box<dyn ExternalInterfaceMethod>> {
-        match name {
-            "trace" => Some(Box::new(do_trace)),
-            "ping" => Some(Box::new(do_ping)),
-            "reentry" => Some(Box::new(do_reentry)),
-            _ => None,
-        }
-    }
-
-    fn on_callback_available(&self, _name: &str) {}
-
-    fn on_fs_command(&self, _command: &str, _args: &str) -> bool {
-        false
-    }
-}
-
 fn main() {
     let args = Arguments::from_args();