Index: src/test/OTOrderedDictionary.h
==================================================================
--- src/test/OTOrderedDictionary.h
+++ src/test/OTOrderedDictionary.h
@@ -26,14 +26,18 @@
  *	  were specified during initialization.
  *
  * @warning This class is only for testing! It is slow and only to be used to
  *	    test extensions of OFDictionary, for example serializations such as
  *	    JSON, where it is desirable to compare to an expected output.
+ *
+ * @note ABI stability for this and all other classes in ObjFWTest is not
+ *	 guaranteed! The assumption is that you recompile your tests after
+ *	 updating ObjFWTest.
  */
 @interface OTOrderedDictionary: OFDictionary
 {
 	OFArray *_keys;
 	OFArray *_objects;
 }
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/test/OTTestCase.h
==================================================================
--- src/test/OTTestCase.h
+++ src/test/OTTestCase.h
@@ -25,10 +25,14 @@
  * @brief A class meant for subclassing to create a test case, consisting of
  *	  one or more tests.
  *
  * All methods with the prefix `test` that take no arguments of all classes
  * that subclass this class are automatically executed by ObjFWTest.
+ *
+ * @note ABI stability for this and all other classes in ObjFWTest is not
+ *	 guaranteed! The assumption is that you recompile your tests after
+ *	 updating ObjFWTest.
  */
 @interface OTTestCase: OFObject
 #ifdef OF_HAVE_CLASS_PROPERTIES
 @property (class, readonly, nullable, nonatomic)
     OFArray OF_GENERIC(OFPair OF_GENERIC(OFString *, id) *) *summary;