diff --git a/src/app/(protected)/workorders/_components/list/table/wo-table-header-label.tsx b/src/app/(protected)/workorders/_components/list/table/wo-table-header-label.tsx
index 0f4a5fc5..1902b463 100644
--- a/src/app/(protected)/workorders/_components/list/table/wo-table-header-label.tsx
+++ b/src/app/(protected)/workorders/_components/list/table/wo-table-header-label.tsx
@@ -19,14 +19,20 @@ export function WoTableHeaderLabel({ colKey, label }: WoTableHeaderLabelProps) {
     <span style={{ display: "inline-flex", alignItems: "center", gap: 4 }}>
       {label}
       <Tooltip title={tooltip} arrow placement="top">
-        <span
-          role="img"
+        <button
+          type="button"
           aria-label={`${label} column help`}
-          tabIndex={0}
-          style={{ display: "inline-flex", cursor: "help", color: "var(--color-text-muted)" }}
+          style={{
+            display: "inline-flex",
+            cursor: "help",
+            color: "var(--color-text-muted)",
+            padding: 0,
+            border: 0,
+            background: "transparent",
+          }}
         >
           <CircleQuestionMark size={13} aria-hidden="true" />
-        </span>
+        </button>
       </Tooltip>
     </span>
   );
diff --git a/src/domain/work-orders/constants/wo-table-header-tooltips.ts b/src/domain/work-orders/constants/wo-table-header-tooltips.ts
index f0848cf9..24ff23be 100644
--- a/src/domain/work-orders/constants/wo-table-header-tooltips.ts
+++ b/src/domain/work-orders/constants/wo-table-header-tooltips.ts
@@ -1,5 +1,5 @@
 /**
- * Help copy for date-column headers on the work orders board table (SH-195).
+ * Help copy for date-column headers on the work orders board table.
  * Keyed by the `WO_TABLE_COLS` column key; only columns with copy here show a
  * header help icon. `appt` (Appt Time) is an intentional open point — do not
  * add it without a business-rule decision.
diff --git a/src/test/app/(protected)/workorders/wo-table-head-date-tooltips.test.tsx b/src/test/app/(protected)/workorders/wo-table-head-date-tooltips.test.tsx
index 694013bb..a25bd953 100644
--- a/src/test/app/(protected)/workorders/wo-table-head-date-tooltips.test.tsx
+++ b/src/test/app/(protected)/workorders/wo-table-head-date-tooltips.test.tsx
@@ -39,7 +39,7 @@ describe("WoTableHead date column header tooltips (SH-195)", () => {
       renderHead();
 
       const header = screen.getByRole("columnheader", { name: new RegExp(`^${columnName}`) });
-      const icon = within(header).getByRole("img", { name: `${columnName} column help` });
+      const icon = within(header).getByRole("button", { name: `${columnName} column help` });
 
       await user.hover(icon);
 
@@ -54,7 +54,7 @@ describe("WoTableHead date column header tooltips (SH-195)", () => {
     renderHead();
 
     const header = screen.getByRole("columnheader", { name: /^SCHEDULE ON/ });
-    const icon = within(header).getByRole("img", { name: "SCHEDULE ON column help" });
+    const icon = within(header).getByRole("button", { name: "SCHEDULE ON column help" });
 
     await user.tab();