diff --git a/development/design.rst b/development/design.rst
index ae166d9..860f0d7 100644
--- a/development/design.rst
+++ b/development/design.rst
@@ -6,7 +6,7 @@
 ====================
 
 KUnit in practice is divided into two components: the KUnit kernel (more often
-referred to as the KUnit kernel, or just the kernel), and the kunit_tool. Most
+referred to as the KUnit kernel, or just the kernel), and kunit.py. Most
 of KUnit, including all the test cases, all of the test libraries, and even the
 test runner itself are all part of the Linux kernel.
 
@@ -108,10 +108,10 @@
 The function definition can be found here:
 https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git/tree/lib/kunit/test.c?h=test&id=741a98d022362c90609ac9dcd8ad56314d8e68b3#n152
 
-kunit_tool
-----------
+kunit.py
+--------
 
-Currently the main purpose kunit_tool serves is just to make to process of
+Currently the main purpose kunit.py serves is just to make to process of
 building the kernel and running tests easier, but it also serves as a place
 where workarounds can be added in. For example, there are some bugs (for
 example, if the UML kernel crashes, it will corrupt the user's terminal
diff --git a/development/useful-commands.rst b/development/useful-commands.rst
index 8f41b56..1602d3d 100644
--- a/development/useful-commands.rst
+++ b/development/useful-commands.rst
@@ -5,8 +5,8 @@
 Building and Running KUnit Manually
 ===================================
 
-Sometimes for debugging kunit_tool or the interaction between the KUnit kernel
-and kunit_tool it is useful to build and run the tests manually:
+Sometimes for debugging kunit.py or the interaction between the KUnit kernel
+and kunit.py, it is useful to build and run the tests manually:
 
 .. code-block:: bash