diff --git a/src/defaultV2-theme/blocks/sd-table.scss b/src/defaultV2-theme/blocks/sd-table.scss
index 38037d695a..cd41c2f9ab 100644
--- a/src/defaultV2-theme/blocks/sd-table.scss
+++ b/src/defaultV2-theme/blocks/sd-table.scss
@@ -190,6 +190,8 @@
   width: calcSize(1);
   &:not(.sd-table__cell--drag):first-of-type {
       padding-left: 0;
+      width: calcSize(5);
+      min-width: calcSize(5);
     }
 }
 
diff --git a/visualRegressionTests/tests/defaultV2/etalons/question-matrix-dropdown-detail-no-header-expanded.png b/visualRegressionTests/tests/defaultV2/etalons/question-matrix-dropdown-detail-no-header-expanded.png
new file mode 100644
index 0000000000..4d3f08d1be
Binary files /dev/null and b/visualRegressionTests/tests/defaultV2/etalons/question-matrix-dropdown-detail-no-header-expanded.png differ
diff --git a/visualRegressionTests/tests/defaultV2/etalons/question-matrix-dropdown-detail-no-header.png b/visualRegressionTests/tests/defaultV2/etalons/question-matrix-dropdown-detail-no-header.png
new file mode 100644
index 0000000000..aa81c80994
Binary files /dev/null and b/visualRegressionTests/tests/defaultV2/etalons/question-matrix-dropdown-detail-no-header.png differ
diff --git a/visualRegressionTests/tests/defaultV2/matrix.ts b/visualRegressionTests/tests/defaultV2/matrix.ts
index 2a1159fc93..dfc9ff8a64 100644
--- a/visualRegressionTests/tests/defaultV2/matrix.ts
+++ b/visualRegressionTests/tests/defaultV2/matrix.ts
@@ -364,6 +364,13 @@ frameworks.forEach(framework => {
 
       await takeElementScreenshot("question-matrix-dropdown-detail-expanded.png", questionRoot, t, comparer);
 
+      await ClientFunction(() => { window["survey"].getQuestionByName("q").showHeader = false; })();
+      await takeElementScreenshot("question-matrix-dropdown-detail-no-header-expanded.png", questionRoot, t, comparer);
+
+      await t.click(Selector(".sd-table__cell--detail-button").filterVisible().nth(1));
+      await t.hover(questionRoot, { offsetX: 1, offsetY: 1 });
+
+      await takeElementScreenshot("question-matrix-dropdown-detail-no-header.png", questionRoot, t, comparer);
     });
   });