diff --git a/src/lib/components/test_cases/TestCaseGraph.svelte b/src/lib/components/test_cases/TestCaseGraph.svelte
index da9da53febe57b789535b964abad8f6fd2668991..e9e8470f3c7dbf301a69cb5085dba757f76db6e2 100644
--- a/src/lib/components/test_cases/TestCaseGraph.svelte
+++ b/src/lib/components/test_cases/TestCaseGraph.svelte
@@ -1059,6 +1059,7 @@
                             initialPlacement="top"
                           >
                             <button
+                              aria-label={isSelected ? "Cacher" : "Montrer"}
                               class="group h-full pl-0.5 pr-1"
                               onclick={() => {
                                 variableCustomizations[