diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 83c595ce241..c99600b8c31 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -4004,7 +4004,7 @@ impl<'test> TestCx<'test> {
         };
 
         let stderr = if force_color_svg {
-            anstyle_svg::Term::new().render_svg(&proc_res.stderr)
+            anstyle_svg::Term::new().min_width_px(730).render_svg(&proc_res.stderr)
         } else if explicit_format {
             proc_res.stderr.clone()
         } else {
diff --git a/tests/ui/codemap_tests/huge_multispan_highlight.svg b/tests/ui/codemap_tests/huge_multispan_highlight.svg
index 403e9961102..f26a2bd7275 100644
--- a/tests/ui/codemap_tests/huge_multispan_highlight.svg
+++ b/tests/ui/codemap_tests/huge_multispan_highlight.svg
@@ -1,4 +1,4 @@
-<svg width="743px" height="848px" xmlns="http://www.w3.org/2000/svg">
+<svg width="750px" height="848px" xmlns="http://www.w3.org/2000/svg">
   <style>
     .fg { fill: #AAAAAA }
     .bg { background: #000000 }
diff --git a/tests/ui/diagnostic-flags/colored-session-opt-error.svg b/tests/ui/diagnostic-flags/colored-session-opt-error.svg
index e8835534e04..69f452f29f3 100644
--- a/tests/ui/diagnostic-flags/colored-session-opt-error.svg
+++ b/tests/ui/diagnostic-flags/colored-session-opt-error.svg
@@ -1,4 +1,4 @@
-<svg width="740px" height="74px" xmlns="http://www.w3.org/2000/svg">
+<svg width="750px" height="74px" xmlns="http://www.w3.org/2000/svg">
   <style>
     .fg { fill: #AAAAAA }
     .bg { background: #000000 }