diff --git a/src/main.zig b/src/main.zig
index a7f3a050..95cdcead 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -603,7 +603,7 @@ test "tests:beforeAll" {
     log.opts.format = .logfmt;
 
     test_wg.startMany(3);
-    _ = try Platform.init();
+    const platform = try Platform.init();
 
     {
         const address = try std.net.Address.parseIp("127.0.0.1", 9582);
@@ -619,7 +619,7 @@ test "tests:beforeAll" {
 
     {
         const address = try std.net.Address.parseIp("127.0.0.1", 9583);
-        const thread = try std.Thread.spawn(.{}, serveCDP, .{address});
+        const thread = try std.Thread.spawn(.{}, serveCDP, .{ address, &platform });
         thread.detach();
     }
 
@@ -801,11 +801,12 @@ fn serveHTTPS(address: std.net.Address) !void {
     }
 }
 
-fn serveCDP(address: std.net.Address) !void {
+fn serveCDP(address: std.net.Address, platform: *const Platform) !void {
     var gpa: std.heap.GeneralPurposeAllocator(.{}) = .init;
     var app = try App.init(gpa.allocator(), .{
         .run_mode = .serve,
         .tls_verify_host = false,
+        .platform = platform,
     });
     defer app.deinit();
 
diff --git a/src/runtime/js.zig b/src/runtime/js.zig
index bd35bdd8..80585970 100644
--- a/src/runtime/js.zig
+++ b/src/runtime/js.zig
@@ -274,18 +274,12 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
         }
 
         pub fn pumpMessageLoop(self: *const Self) bool {
-            if (comptime builtin.is_test) {
-                if (self.platform == null) return false;
-            }
-            // assume it's not-null in non-test.
+            // assume it's not-null.
             return self.platform.?.inner.pumpMessageLoop(self.isolate, false);
         }
 
         pub fn runIdleTasks(self: *const Self) void {
-            if (comptime builtin.is_test) {
-                if (self.platform == null) return;
-            }
-            // assume it's not-null in non-test.
+            // assume it's not-null.
             return self.platform.?.inner.runIdleTasks(self.isolate, 1);
         }