diff --git a/test/plugins/removeHiddenElems.16.svg b/test/plugins/removeHiddenElems.16.svg.txt
similarity index 100%
rename from test/plugins/removeHiddenElems.16.svg
rename to test/plugins/removeHiddenElems.16.svg.txt
diff --git a/test/plugins/removeHiddenElems.17.svg b/test/plugins/removeHiddenElems.17.svg.txt
similarity index 87%
rename from test/plugins/removeHiddenElems.17.svg
rename to test/plugins/removeHiddenElems.17.svg.txt
index ef3557e0a..38ab1e363 100644
--- a/test/plugins/removeHiddenElems.17.svg
+++ b/test/plugins/removeHiddenElems.17.svg.txt
@@ -1,4 +1,4 @@
-Don't remove used symbols.
+Don't remove nodes that have children with referenced IDs.
 
 ===
 
@@ -20,4 +20,4 @@ Don't remove used symbols.
             <stop offset="5%" stop-color="gold"/>
         </linearGradient>
     </g>
-</svg>
\ No newline at end of file
+</svg>
diff --git a/test/plugins/removeHiddenElems.18.svg b/test/plugins/removeHiddenElems.18.svg.txt
similarity index 100%
rename from test/plugins/removeHiddenElems.18.svg
rename to test/plugins/removeHiddenElems.18.svg.txt
diff --git a/test/plugins/removeUselessDefs.05.svg.txt b/test/plugins/removeUselessDefs.05.svg.txt
index ef3557e0a..38ab1e363 100644
--- a/test/plugins/removeUselessDefs.05.svg.txt
+++ b/test/plugins/removeUselessDefs.05.svg.txt
@@ -1,4 +1,4 @@
-Don't remove used symbols.
+Don't remove nodes that have children with referenced IDs.
 
 ===
 
@@ -20,4 +20,4 @@ Don't remove used symbols.
             <stop offset="5%" stop-color="gold"/>
         </linearGradient>
     </g>
-</svg>
\ No newline at end of file
+</svg>