diff --git a/ext/standard/tests/http/http_build_query/http_build_query_object_basic.phpt b/ext/standard/tests/http/http_build_query/http_build_query_object_basic.phpt
new file mode 100644
index 00000000000..91bb8fc6229
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_object_basic.phpt
@@ -0,0 +1,17 @@
+--TEST--
+http_build_query() function with object
+--FILE--
+<?php
+class KeyVal {
+    public $public = "input";
+    protected $protected = "hello";
+    private $private = "world";
+}
+
+$o = new KeyVal();
+
+// Percent encoded "public=input"
+var_dump(http_build_query($o));
+?>
+--EXPECT--
+string(12) "public=input"
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_object_empty.phpt b/ext/standard/tests/http/http_build_query/http_build_query_object_empty.phpt
new file mode 100644
index 00000000000..7aca03df4a6
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_object_empty.phpt
@@ -0,0 +1,11 @@
+--TEST--
+http_build_query() function with empty object
+--FILE--
+<?php
+class EmptyObj {}
+$o = new EmptyObj();
+
+var_dump(http_build_query($o));
+?>
+--EXPECT--
+string(0) ""
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_object_just_stringable.phpt b/ext/standard/tests/http/http_build_query/http_build_query_object_just_stringable.phpt
new file mode 100644
index 00000000000..4c65547b81c
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_object_just_stringable.phpt
@@ -0,0 +1,22 @@
+--TEST--
+http_build_query() function with object that is just stringable (GH-10229)
+--FILE--
+<?php
+class StringableObject {
+    public function __toString() : string {
+        return "Stringable";
+    }
+}
+
+$o = new StringableObject();
+
+var_dump(http_build_query(['hello', $o]));
+var_dump(http_build_query($o));
+var_dump(http_build_query(['hello', $o], numeric_prefix: 'prefix_'));
+var_dump(http_build_query($o, numeric_prefix: 'prefix_'));
+?>
+--EXPECT--
+string(7) "0=hello"
+string(0) ""
+string(14) "prefix_0=hello"
+string(0) ""
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_object_key_val_stringable.phpt b/ext/standard/tests/http/http_build_query/http_build_query_object_key_val_stringable.phpt
new file mode 100644
index 00000000000..2a738df362a
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_object_key_val_stringable.phpt
@@ -0,0 +1,20 @@
+--TEST--
+http_build_query() function with recursif object
+--FILE--
+<?php
+class KeyValStringable {
+    public $public = "input";
+    protected $protected = "hello";
+    private $private = "world";
+
+    public function __toString(): string {
+        return "Stringable";
+    }
+}
+
+$o = new KeyValStringable();
+
+var_dump(http_build_query($o));
+?>
+--EXPECT--
+string(12) "public=input"
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_object_nested.phpt b/ext/standard/tests/http/http_build_query/http_build_query_object_nested.phpt
new file mode 100644
index 00000000000..125327f0af0
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_object_nested.phpt
@@ -0,0 +1,20 @@
+--TEST--
+http_build_query() function with nested object
+--FILE--
+<?php
+class KeyVal {
+    public $public = "input";
+    protected $protected = "hello";
+    private $private = "world";
+}
+
+$o = new KeyVal();
+$nested = new KeyVal();
+
+$o->public = $nested;
+
+// Percent encoded "public[public]=input"
+var_dump(http_build_query($o));
+?>
+--EXPECT--
+string(24) "public%5Bpublic%5D=input"
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_object_recursif.phpt b/ext/standard/tests/http/http_build_query/http_build_query_object_recursif.phpt
new file mode 100644
index 00000000000..ec415fc115b
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_object_recursif.phpt
@@ -0,0 +1,17 @@
+--TEST--
+http_build_query() function with recursif object
+--FILE--
+<?php
+class KeyVal {
+    public $public = "input";
+    protected $protected = "hello";
+    private $private = "world";
+}
+
+$o = new KeyVal();
+$o->public = $o;
+
+var_dump(http_build_query($o));
+?>
+--EXPECT--
+string(0) ""
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_with_null.phpt b/ext/standard/tests/http/http_build_query/http_build_query_with_null.phpt
new file mode 100644
index 00000000000..3bcd1d0a356
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_with_null.phpt
@@ -0,0 +1,8 @@
+--TEST--
+http_build_query() function with null in array
+--FILE--
+<?php
+var_dump(http_build_query([null]));
+?>
+--EXPECT--
+string(0) ""
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_with_references.phpt b/ext/standard/tests/http/http_build_query/http_build_query_with_references.phpt
new file mode 100644
index 00000000000..4638ae4547c
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_with_references.phpt
@@ -0,0 +1,11 @@
+--TEST--
+http_build_query() function with reference in array
+--FILE--
+<?php
+$v = 'value';
+$ref = &$v;
+
+var_dump(http_build_query([$ref]));
+?>
+--EXPECT--
+string(7) "0=value"
diff --git a/ext/standard/tests/http/http_build_query/http_build_query_with_resource.phpt b/ext/standard/tests/http/http_build_query/http_build_query_with_resource.phpt
new file mode 100644
index 00000000000..c8b31064cd2
--- /dev/null
+++ b/ext/standard/tests/http/http_build_query/http_build_query_with_resource.phpt
@@ -0,0 +1,8 @@
+--TEST--
+http_build_query() function with resource in array
+--FILE--
+<?php
+var_dump(http_build_query([STDIN]));
+?>
+--EXPECT--
+string(0) ""