diff --git a/Plugins/PackageToJS/Templates/instantiate.d.ts b/Plugins/PackageToJS/Templates/instantiate.d.ts
index 2d81ddde..2cf956e5 100644
--- a/Plugins/PackageToJS/Templates/instantiate.d.ts
+++ b/Plugins/PackageToJS/Templates/instantiate.d.ts
@@ -1,8 +1,8 @@
 import type { /* #if USE_SHARED_MEMORY */SwiftRuntimeThreadChannel, /* #endif */SwiftRuntime } from "./runtime.js";
 
 /* #if HAS_BRIDGE */
-// @ts-ignore
 export type { Imports, Exports } from "./bridge.js";
+import type { Imports, Exports } from "./bridge.js";
 /* #else */
 export type Imports = {}
 export type Exports = {}
diff --git a/Tests/BridgeJSRuntimeTests/Generated/ImportTS.swift b/Tests/BridgeJSRuntimeTests/Generated/ImportTS.swift
new file mode 100644
index 00000000..9ecffea5
--- /dev/null
+++ b/Tests/BridgeJSRuntimeTests/Generated/ImportTS.swift
@@ -0,0 +1,50 @@
+// NOTICE: This is auto-generated code by BridgeJS from JavaScriptKit,
+// DO NOT EDIT.
+//
+// To update this file, just rebuild your project or run
+// `swift package bridge-js`.
+
+@_spi(JSObject_id) import JavaScriptKit
+
+@_extern(wasm, module: "bjs", name: "make_jsstring")
+private func _make_jsstring(_ ptr: UnsafePointer<UInt8>?, _ len: Int32) -> Int32
+
+@_extern(wasm, module: "bjs", name: "init_memory_with_result")
+private func _init_memory_with_result(_ ptr: UnsafePointer<UInt8>?, _ len: Int32)
+
+@_extern(wasm, module: "bjs", name: "free_jsobject")
+private func _free_jsobject(_ ptr: Int32) -> Void
+
+func jsRoundTripVoid() -> Void {
+    @_extern(wasm, module: "BridgeJSRuntimeTests", name: "bjs_jsRoundTripVoid")
+    func bjs_jsRoundTripVoid() -> Void
+    bjs_jsRoundTripVoid()
+}
+
+func jsRoundTripNumber(_ v: Double) -> Double {
+    @_extern(wasm, module: "BridgeJSRuntimeTests", name: "bjs_jsRoundTripNumber")
+    func bjs_jsRoundTripNumber(_ v: Float64) -> Float64
+    let ret = bjs_jsRoundTripNumber(v)
+    return Double(ret)
+}
+
+func jsRoundTripBool(_ v: Bool) -> Bool {
+    @_extern(wasm, module: "BridgeJSRuntimeTests", name: "bjs_jsRoundTripBool")
+    func bjs_jsRoundTripBool(_ v: Int32) -> Int32
+    let ret = bjs_jsRoundTripBool(Int32(v ? 1 : 0))
+    return ret == 1
+}
+
+func jsRoundTripString(_ v: String) -> String {
+    @_extern(wasm, module: "BridgeJSRuntimeTests", name: "bjs_jsRoundTripString")
+    func bjs_jsRoundTripString(_ v: Int32) -> Int32
+    var v = v
+    let vId = v.withUTF8 { b in
+        _make_jsstring(b.baseAddress.unsafelyUnwrapped, Int32(b.count))
+    }
+    let ret = bjs_jsRoundTripString(vId)
+    return String(unsafeUninitializedCapacity: Int(ret)) { b in
+        _init_memory_with_result(b.baseAddress.unsafelyUnwrapped, Int32(ret))
+        return Int(ret)
+    }
+}
\ No newline at end of file
diff --git a/Tests/BridgeJSRuntimeTests/Generated/JavaScript/ImportTS.json b/Tests/BridgeJSRuntimeTests/Generated/JavaScript/ImportTS.json
new file mode 100644
index 00000000..9db7f698
--- /dev/null
+++ b/Tests/BridgeJSRuntimeTests/Generated/JavaScript/ImportTS.json
@@ -0,0 +1,77 @@
+{
+  "children" : [
+    {
+      "functions" : [
+        {
+          "name" : "jsRoundTripVoid",
+          "parameters" : [
+
+          ],
+          "returnType" : {
+            "void" : {
+
+            }
+          }
+        },
+        {
+          "name" : "jsRoundTripNumber",
+          "parameters" : [
+            {
+              "name" : "v",
+              "type" : {
+                "double" : {
+
+                }
+              }
+            }
+          ],
+          "returnType" : {
+            "double" : {
+
+            }
+          }
+        },
+        {
+          "name" : "jsRoundTripBool",
+          "parameters" : [
+            {
+              "name" : "v",
+              "type" : {
+                "bool" : {
+
+                }
+              }
+            }
+          ],
+          "returnType" : {
+            "bool" : {
+
+            }
+          }
+        },
+        {
+          "name" : "jsRoundTripString",
+          "parameters" : [
+            {
+              "name" : "v",
+              "type" : {
+                "string" : {
+
+                }
+              }
+            }
+          ],
+          "returnType" : {
+            "string" : {
+
+            }
+          }
+        }
+      ],
+      "types" : [
+
+      ]
+    }
+  ],
+  "moduleName" : "BridgeJSRuntimeTests"
+}
\ No newline at end of file
diff --git a/Tests/BridgeJSRuntimeTests/ImportAPITests.swift b/Tests/BridgeJSRuntimeTests/ImportAPITests.swift
new file mode 100644
index 00000000..98479d20
--- /dev/null
+++ b/Tests/BridgeJSRuntimeTests/ImportAPITests.swift
@@ -0,0 +1,37 @@
+import XCTest
+import JavaScriptKit
+
+class ImportAPITests: XCTestCase {
+    func testRoundTripVoid() {
+        jsRoundTripVoid()
+    }
+
+    func testRoundTripNumber() {
+        for v in [
+            0, 1, -1,
+            Double(Int32.max), Double(Int32.min),
+            Double(Int64.max), Double(Int64.min),
+            Double(UInt32.max), Double(UInt32.min),
+            Double(UInt64.max), Double(UInt64.min),
+            Double.greatestFiniteMagnitude, Double.leastNonzeroMagnitude,
+            Double.infinity,
+            Double.pi,
+        ] {
+            XCTAssertEqual(jsRoundTripNumber(v), v)
+        }
+
+        XCTAssert(jsRoundTripNumber(Double.nan).isNaN)
+    }
+
+    func testRoundTripBool() {
+        for v in [true, false] {
+            XCTAssertEqual(jsRoundTripBool(v), v)
+        }
+    }
+
+    func testRoundTripString() {
+        for v in ["", "Hello, world!", "🧑‍🧑‍🧒"] {
+            XCTAssertEqual(jsRoundTripString(v), v)
+        }
+    }
+}
diff --git a/Tests/BridgeJSRuntimeTests/bridge.d.ts b/Tests/BridgeJSRuntimeTests/bridge.d.ts
new file mode 100644
index 00000000..1a092f90
--- /dev/null
+++ b/Tests/BridgeJSRuntimeTests/bridge.d.ts
@@ -0,0 +1,4 @@
+export function jsRoundTripVoid(): void
+export function jsRoundTripNumber(v: number): number
+export function jsRoundTripBool(v: boolean): boolean
+export function jsRoundTripString(v: string): string
diff --git a/Tests/prelude.mjs b/Tests/prelude.mjs
index 2501bd58..38586296 100644
--- a/Tests/prelude.mjs
+++ b/Tests/prelude.mjs
@@ -1,20 +1,34 @@
-/** @type {import('./../.build/plugins/PackageToJS/outputs/PackageTests/test.d.ts').Prelude["setupOptions"]} */
+/** @type {import('../.build/plugins/PackageToJS/outputs/PackageTests/test.d.ts').SetupOptions} */
 export function setupOptions(options, context) {
     Error.stackTraceLimit = 100;
     setupTestGlobals(globalThis);
     return {
         ...options,
+        imports: {
+            "jsRoundTripVoid": () => {
+                return;
+            },
+            "jsRoundTripNumber": (v) => {
+                return v;
+            },
+            "jsRoundTripBool": (v) => {
+                return v;
+            },
+            "jsRoundTripString": (v) => {
+                return v;
+            },
+        },
         addToCoreImports(importObject, importsContext) {
             const { getInstance, getExports } = importsContext;
             options.addToCoreImports?.(importObject, importsContext);
             importObject["JavaScriptEventLoopTestSupportTests"] = {
                 "isMainThread": () => context.isMainThread,
             }
-            importObject["BridgeJSRuntimeTests"] = {
-                "runJsWorks": () => {
-                    return BridgeJSRuntimeTests_runJsWorks(getInstance(), getExports());
-                },
+            const bridgeJSRuntimeTests = importObject["BridgeJSRuntimeTests"] || {};
+            bridgeJSRuntimeTests["runJsWorks"] = () => {
+                return BridgeJSRuntimeTests_runJsWorks(getInstance(), getExports());
             }
+            importObject["BridgeJSRuntimeTests"] = bridgeJSRuntimeTests;
         }
     }
 }