diff --git a/src/tests/test_auth.zig b/src/tests/test_auth.zig
index 514b4c9..14c7ead 100644
--- a/src/tests/test_auth.zig
+++ b/src/tests/test_auth.zig
@@ -184,7 +184,7 @@ test "BearerAuthSingle authenticateRequest OK" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3001,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -211,7 +211,7 @@ test "BearerAuthSingle authenticateRequest OK" {
 
     listener.listen() catch {};
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Bearer, .token = token });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3001/test", .{ .auth = .Bearer, .token = token });
     defer thread.join();
 
     // start worker threads
@@ -231,7 +231,7 @@ test "BearerAuthSingle authenticateRequest test-unauthorized" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3002,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -264,7 +264,7 @@ test "BearerAuthSingle authenticateRequest test-unauthorized" {
 
     try listener.listen();
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Bearer, .token = "invalid" });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3002/test", .{ .auth = .Bearer, .token = "invalid" });
     defer thread.join();
 
     // start worker threads
@@ -284,7 +284,7 @@ test "BearerAuthMulti authenticateRequest OK" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3003,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -311,7 +311,7 @@ test "BearerAuthMulti authenticateRequest OK" {
 
     try listener.listen();
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Bearer, .token = token });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3003/test", .{ .auth = .Bearer, .token = token });
     defer thread.join();
 
     // start worker threads
@@ -331,7 +331,7 @@ test "BearerAuthMulti authenticateRequest test-unauthorized" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3004,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -358,7 +358,7 @@ test "BearerAuthMulti authenticateRequest test-unauthorized" {
 
     listener.listen() catch {};
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Bearer, .token = "invalid" });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3004/test", .{ .auth = .Bearer, .token = "invalid" });
     defer thread.join();
 
     // start worker threads
@@ -378,7 +378,7 @@ test "BasicAuth Token68 authenticateRequest" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3005,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -410,7 +410,7 @@ test "BasicAuth Token68 authenticateRequest" {
 
     listener.listen() catch {};
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Basic, .token = token });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3005/test", .{ .auth = .Basic, .token = token });
     defer thread.join();
 
     // start worker threads
@@ -430,7 +430,7 @@ test "BasicAuth Token68 authenticateRequest test-unauthorized" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3006,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -462,7 +462,7 @@ test "BasicAuth Token68 authenticateRequest test-unauthorized" {
 
     listener.listen() catch {};
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Basic, .token = "invalid" });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3006/test", .{ .auth = .Basic, .token = "invalid" });
     defer thread.join();
 
     // start worker threads
@@ -481,7 +481,7 @@ test "BasicAuth UserPass authenticateRequest" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3007,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -524,7 +524,7 @@ test "BasicAuth UserPass authenticateRequest" {
 
     listener.listen() catch {};
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Basic, .token = encoded });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3007/test", .{ .auth = .Basic, .token = encoded });
     defer thread.join();
 
     // start worker threads
@@ -543,7 +543,7 @@ test "BasicAuth UserPass authenticateRequest test-unauthorized" {
     var listener = zap.Endpoint.Listener.init(
         a,
         .{
-            .port = 3000,
+            .port = 3008,
             .on_request = null,
             .log = false,
             .max_clients = 10,
@@ -589,7 +589,7 @@ test "BasicAuth UserPass authenticateRequest test-unauthorized" {
 
     listener.listen() catch {};
 
-    const thread = try makeRequestThread(a, "http://127.0.0.1:3000/test", .{ .auth = .Basic, .token = "invalid" });
+    const thread = try makeRequestThread(a, "http://127.0.0.1:3008/test", .{ .auth = .Basic, .token = "invalid" });
     defer thread.join();
 
     // start worker threads
diff --git a/src/tests/test_http_params.zig b/src/tests/test_http_params.zig
index 9ba49b5..eefb76e 100644
--- a/src/tests/test_http_params.zig
+++ b/src/tests/test_http_params.zig
@@ -65,7 +65,7 @@ test "http parameters" {
     // setup listener
     var listener = zap.HttpListener.init(
         .{
-            .port = 3001,
+            .port = 3010,
             .on_request = Handler.on_request,
             .log = false,
             .max_clients = 10,
@@ -74,7 +74,7 @@ test "http parameters" {
     );
     try listener.listen();
 
-    const thread = try makeRequestThread(allocator, "http://127.0.0.1:3001/?one=1&two=2&string=hello+world&float=6.28&bool=true");
+    const thread = try makeRequestThread(allocator, "http://127.0.0.1:3010/?one=1&two=2&string=hello+world&float=6.28&bool=true");
     defer thread.join();
     zap.start(.{
         .threads = 1,
diff --git a/src/tests/test_recvfile.zig b/src/tests/test_recvfile.zig
index f232020..7c9bbf8 100644
--- a/src/tests/test_recvfile.zig
+++ b/src/tests/test_recvfile.zig
@@ -110,7 +110,7 @@ test "recv file" {
 
     var listener = zap.HttpListener.init(
         .{
-            .port = 3003,
+            .port = 3020,
             .on_request = on_request,
             .log = false,
             .max_clients = 10,
@@ -119,7 +119,7 @@ test "recv file" {
     );
     try listener.listen();
 
-    const t1 = try std.Thread.spawn(.{}, makeRequest, .{ allocator, "http://127.0.0.1:3003" });
+    const t1 = try std.Thread.spawn(.{}, makeRequest, .{ allocator, "http://127.0.0.1:3020" });
     defer t1.join();
 
     zap.start(.{
diff --git a/src/tests/test_recvfile_notype.zig b/src/tests/test_recvfile_notype.zig
index 9f56730..827342a 100644
--- a/src/tests/test_recvfile_notype.zig
+++ b/src/tests/test_recvfile_notype.zig
@@ -108,7 +108,7 @@ test "recv file" {
 
     var listener = zap.HttpListener.init(
         .{
-            .port = 3003,
+            .port = 3030,
             .on_request = on_request,
             .log = false,
             .max_clients = 10,
@@ -117,7 +117,7 @@ test "recv file" {
     );
     try listener.listen();
 
-    const t1 = try std.Thread.spawn(.{}, makeRequest, .{ allocator, "http://127.0.0.1:3003" });
+    const t1 = try std.Thread.spawn(.{}, makeRequest, .{ allocator, "http://127.0.0.1:3030" });
     defer t1.join();
 
     zap.start(.{
diff --git a/src/tests/test_sendfile.zig b/src/tests/test_sendfile.zig
index 55124bf..d70bde6 100644
--- a/src/tests/test_sendfile.zig
+++ b/src/tests/test_sendfile.zig
@@ -42,7 +42,7 @@ test "send file" {
     // setup listener
     var listener = zap.HttpListener.init(
         .{
-            .port = 3002,
+            .port = 3040,
             .on_request = on_request,
             .log = false,
             .max_clients = 10,
@@ -51,7 +51,7 @@ test "send file" {
     );
     try listener.listen();
 
-    const thread = try makeRequestThread(allocator, "http://127.0.0.1:3002/?file=src/tests/testfile.txt");
+    const thread = try makeRequestThread(allocator, "http://127.0.0.1:3040/?file=src/tests/testfile.txt");
     defer thread.join();
     zap.start(.{
         .threads = 1,