diff --git a/Help/command/ctest_build.rst b/Help/command/ctest_build.rst
index d3ceb2df84d0d126949ed983abe60c6505b173db..55bb4a317d75cb6eec3d544161f28c40463bf0e4 100644
--- a/Help/command/ctest_build.rst
+++ b/Help/command/ctest_build.rst
@@ -30,9 +30,11 @@ The options are:
   :variable:`CTEST_BINARY_DIRECTORY` variable is used.
 
 ``APPEND``
-  Mark results for append to those previously submitted to a
+  Mark ``Build.xml`` for append to results previously submitted to a
   dashboard server since the last :command:`ctest_start` call.
   Append semantics are defined by the dashboard server in use.
+  This does *not* cause results to be appended to a ``.xml`` file
+  produced by a previous call to this command.
 
 ``CONFIGURATION <config>``
   Specify the build configuration (e.g. ``Debug``).  If not
diff --git a/Help/command/ctest_configure.rst b/Help/command/ctest_configure.rst
index b11e77c4aa3716df3b0e094e9be3d78b0a968db4..2dea07b16f66677743ced6c0bf9935e8498a1fa1 100644
--- a/Help/command/ctest_configure.rst
+++ b/Help/command/ctest_configure.rst
@@ -23,9 +23,11 @@ The options are:
   :variable:`CTEST_SOURCE_DIRECTORY` variable is used.
 
 ``APPEND``
-  Mark results for append to those previously submitted to a
+  Mark ``Configure.xml`` for append to results previously submitted to a
   dashboard server since the last :command:`ctest_start` call.
   Append semantics are defined by the dashboard server in use.
+  This does *not* cause results to be appended to a ``.xml`` file
+  produced by a previous call to this command.
 
 ``OPTIONS <options>``
   Specify command-line arguments to pass to the configuration tool.
diff --git a/Help/command/ctest_coverage.rst b/Help/command/ctest_coverage.rst
index ec1ee25941dfff6986e9a26f1e01d4a9ea8e3078..8d27b9c1b1ea3f968ed4590a09e450e93ea8e565 100644
--- a/Help/command/ctest_coverage.rst
+++ b/Help/command/ctest_coverage.rst
@@ -22,9 +22,11 @@ The options are:
   :variable:`CTEST_BINARY_DIRECTORY` variable is used.
 
 ``APPEND``
-  Mark results for append to those previously submitted to a
+  Mark ``Coverage.xml`` for append to results previously submitted to a
   dashboard server since the last :command:`ctest_start` call.
   Append semantics are defined by the dashboard server in use.
+  This does *not* cause results to be appended to a ``.xml`` file
+  produced by a previous call to this command.
 
 ``LABELS``
   Filter the coverage report to include only source files labeled
diff --git a/Help/command/ctest_test.rst b/Help/command/ctest_test.rst
index 551bc586084b00fe1a194776eb1fdae39fd252c0..ce50d4297c640d6bb0a52968934301239b22f155 100644
--- a/Help/command/ctest_test.rst
+++ b/Help/command/ctest_test.rst
@@ -32,9 +32,11 @@ The options are:
   :variable:`CTEST_BINARY_DIRECTORY` variable is used.
 
 ``APPEND``
-  Mark results for append to those previously submitted to a
+  Mark ``Test.xml`` for append to results previously submitted to a
   dashboard server since the last :command:`ctest_start` call.
   Append semantics are defined by the dashboard server in use.
+  This does *not* cause results to be appended to a ``.xml`` file
+  produced by a previous call to this command.
 
 ``START <start-number>``
   Specify the beginning of a range of test numbers.