diff --git a/draftlogs/6875_change.md b/draftlogs/6875_change.md
new file mode 100644
index 00000000000..37c2fd5cb07
--- /dev/null
+++ b/draftlogs/6875_change.md
@@ -0,0 +1 @@
+- Unified hover: use `legend.tracegroupgap` in mock legend instead of setting a hardcoded value [[#6864](https://github.com/plotly/plotly.js/pull/6864)]
\ No newline at end of file
diff --git a/src/components/fx/hover.js b/src/components/fx/hover.js
index 59642856e86..6793daca348 100644
--- a/src/components/fx/hover.js
+++ b/src/components/fx/hover.js
@@ -1139,7 +1139,7 @@ function createHoverText(hoverData, opts) {
                 bgcolor: hoverlabel.bgcolor,
                 bordercolor: hoverlabel.bordercolor,
                 borderwidth: 1,
-                tracegroupgap: 7,
+                tracegroupgap: fullLayout.legend ? fullLayout.legend.tracegroupgap : undefined,
                 traceorder: fullLayout.legend ? fullLayout.legend.traceorder : undefined,
                 orientation: 'v'
             }