diff --git a/src/toolbar/ActionButton.tsx b/src/toolbar/ActionButton.tsx
index a4bfadb2..524dc8f4 100644
--- a/src/toolbar/ActionButton.tsx
+++ b/src/toolbar/ActionButton.tsx
@@ -96,6 +96,8 @@ const ActionButton: React.VoidFunctionComponent<ActionButtonProps> = ({
                     aria-label={label}
                     elementRef={tooltipTargetRef as IRef<HTMLButtonElement>}
                     {...tooltipTargetProps}
+                    // https://github.com/palantir/blueprint/pull/5300
+                    aria-haspopup={undefined}
                     intent={Intent.PRIMARY}
                     onClick={onAction}
                     disabled={enabled === false}
diff --git a/src/toolbar/OpenFileButton.tsx b/src/toolbar/OpenFileButton.tsx
index ea35a146..20c283d3 100644
--- a/src/toolbar/OpenFileButton.tsx
+++ b/src/toolbar/OpenFileButton.tsx
@@ -111,6 +111,8 @@ const OpenFileButton: React.VoidFunctionComponent<OpenFileButtonProps> = ({
                         refKey: 'elementRef',
                         elementRef: tooltipTargetRef as IRef<HTMLButtonElement>,
                         ...tooltipTargetProps,
+                        // https://github.com/palantir/blueprint/pull/5300
+                        'aria-haspopup': undefined,
                         intent: Intent.PRIMARY,
                         disabled: enabled === false,
                         style: enabled === false ? pointerEventsNone : undefined,