diff --git a/tests/info.phpt b/tests/info.phpt
new file mode 100644
index 0000000..de43b18
--- /dev/null
+++ b/tests/info.phpt
@@ -0,0 +1,21 @@
+--TEST--
+info
+--EXTENSIONS--
+vyrtue
+--FILE--
+<?php
+phpinfo(INFO_MODULES);
+--EXPECTF--
+%A
+vyrtue
+%A
+Version => %A
+Released => %A
+Authors => %A
+%A
+143 => vyrtue internal
+545 => vyrtue internal
+542 => vyrtue internal
+516 => vyrtue internal
+70 => vyrtue internal
+%A
diff --git a/tests/replacement/replacement-06.phpt b/tests/replacement/replacement-06.phpt
new file mode 100644
index 0000000..5443b4f
--- /dev/null
+++ b/tests/replacement/replacement-06.phpt
@@ -0,0 +1,13 @@
+--TEST--
+replacement 06
+--EXTENSIONS--
+vyrtue
+--SKIPIF--
+<?php if (!VyrtueExt\DEBUG) die("skip: vyrtue not debug build"); ?>
+--FILE--
+<?php
+namespace FooBar;
+var_dump(\VyrtueExt\Debug\sample_replacement_function());
+--EXPECT--
+entering sample function
+int(12345)
diff --git a/tests/replacement/replacement-07.phpt b/tests/replacement/replacement-07.phpt
new file mode 100644
index 0000000..e31af27
--- /dev/null
+++ b/tests/replacement/replacement-07.phpt
@@ -0,0 +1,14 @@
+--TEST--
+replacement 07
+--EXTENSIONS--
+vyrtue
+--SKIPIF--
+<?php if (!VyrtueExt\DEBUG) die("skip: vyrtue not debug build"); ?>
+--FILE--
+<?php
+namespace FooBar;
+use VyrtueExt\Debug;
+var_dump(Debug\sample_replacement_function());
+--EXPECT--
+entering sample function
+int(12345)
diff --git a/tests/replacement/replacement-08.phpt b/tests/replacement/replacement-08.phpt
new file mode 100644
index 0000000..b20407d
--- /dev/null
+++ b/tests/replacement/replacement-08.phpt
@@ -0,0 +1,14 @@
+--TEST--
+replacement 08
+--EXTENSIONS--
+vyrtue
+--SKIPIF--
+<?php if (!VyrtueExt\DEBUG) die("skip: vyrtue not debug build"); ?>
+--FILE--
+<?php
+namespace FooBar;
+use VyrtueExt\Debug as VyrtueExtDebug;
+var_dump(VyrtueExtDebug\sample_replacement_function());
+--EXPECT--
+entering sample function
+int(12345)
diff --git a/tests/replacement/replacement-09.phpt b/tests/replacement/replacement-09.phpt
new file mode 100644
index 0000000..518f945
--- /dev/null
+++ b/tests/replacement/replacement-09.phpt
@@ -0,0 +1,14 @@
+--TEST--
+replacement 09
+--EXTENSIONS--
+vyrtue
+--SKIPIF--
+<?php if (!VyrtueExt\DEBUG) die("skip: vyrtue not debug build"); ?>
+--FILE--
+<?php
+namespace FooBar {
+    var_dump(\VyrtueExt\Debug\sample_replacement_function());
+}
+--EXPECT--
+entering sample function
+int(12345)