diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
index 55c79d353539ca..7921b21687161b 100644
--- a/Lib/unittest/case.py
+++ b/Lib/unittest/case.py
@@ -362,18 +362,21 @@ def __iter__(self):
 class TestCase(object):
     """A class whose instances are single test cases.
 
-    By default, the test code itself should be placed in a method named
-    'runTest'.
-
-    If the fixture may be used for many test cases, create as
-    many test methods as are needed. When instantiating such a TestCase
-    subclass, specify in the constructor arguments the name of the test method
-    that the instance is to execute.
-
-    Test authors should subclass TestCase for their own tests. Construction
-    and deconstruction of the test's environment ('fixture') can be
+    Test authors may invoke unittest.main() from the subclass's "__name__ guard"
+    section to run all methods defined in the test class. Alternatively,
+    test authors may subclass this TestCase class for their own tests.
+    Testing code may be placed in subclass method named 'runTest';
+    To achieve more precise subclass test invocation see below (viz.,
+    constructor kwarg).
+
+    Construction and destruction of the tests' environment ('fixture') can be
     implemented by overriding the 'setUp' and 'tearDown' methods respectively.
 
+    If the fixture will be used for several distinct test cases, create as
+    many test methods as needed in the TestCase subclass, then specify a
+    method to execute by providing the method name in the 'methodName'
+    parameter of the instance constructor.
+
     If it is necessary to override the __init__ method, the base class
     __init__ method must always be called. It is important that subclasses
     should not change the signature of their __init__ method, since instances
diff --git a/Misc/NEWS.d/next/Documentation/2024-07-23-20-18-31.gh-issue-122196.pYwrvo.rst b/Misc/NEWS.d/next/Documentation/2024-07-23-20-18-31.gh-issue-122196.pYwrvo.rst
new file mode 100644
index 00000000000000..29c3f8426fc487
--- /dev/null
+++ b/Misc/NEWS.d/next/Documentation/2024-07-23-20-18-31.gh-issue-122196.pYwrvo.rst
@@ -0,0 +1 @@
+The former docstring for `TestCase(object)` inappropriately uses the technical term 'fixture' before introducing or defining it. This violates the principle of term definition prior to usage. Therefore, I have re-arranged the description so that the definition comes before the usage. Additional semantic changes made to be clearer, more understandable, and linear.