diff --git a/api/src/org/labkey/api/query/AbstractNestableDataRegion.java b/api/src/org/labkey/api/query/AbstractNestableDataRegion.java
index 2392710f88f..00b29cf5acb 100644
--- a/api/src/org/labkey/api/query/AbstractNestableDataRegion.java
+++ b/api/src/org/labkey/api/query/AbstractNestableDataRegion.java
@@ -38,6 +38,7 @@
 
 import static org.labkey.api.util.DOM.A;
 import static org.labkey.api.util.DOM.Attribute.align;
+import static org.labkey.api.util.DOM.Attribute.alt;
 import static org.labkey.api.util.DOM.Attribute.colspan;
 import static org.labkey.api.util.DOM.Attribute.id;
 import static org.labkey.api.util.DOM.Attribute.src;
@@ -94,7 +95,8 @@ protected void renderExtraRecordSelectorContent(RenderContext ctx, HtmlWriter ou
                 at(
                     id, getName() + "-Handle" + value,
                     valign, "middle",
-                    src, ctx.getViewContext().getContextPath() + "/_images/" + (_expanded ? "minus" : "plus") + ".gif"
+                    src, ctx.getViewContext().getContextPath() + "/_images/" + (_expanded ? "minus" : "plus") + ".gif",
+                    alt, _expanded ? "Collapse row" : "Expand row"
                 )
             )
         ).appendTo(out);
diff --git a/api/src/org/labkey/api/util/LinkBuilder.java b/api/src/org/labkey/api/util/LinkBuilder.java
index 13c5ff67262..26c90f4a50b 100644
--- a/api/src/org/labkey/api/util/LinkBuilder.java
+++ b/api/src/org/labkey/api/util/LinkBuilder.java
@@ -155,7 +155,8 @@ public Appendable appendTo(Appendable out)
                     .at(!lb.enabled, disabled, true)
                     .data(null != lb.tooltip, "tt", "tooltip")
                     .data(null != lb.tooltip, "placement","top")
-                    .data(null != lb.tooltip, "original-title", lb.tooltip),
+                    .data(null != lb.tooltip, "original-title", lb.tooltip)
+                    .at(lb.iconCls != null && lb.tooltip != null, DOM.Attribute.aria_label, lb.tooltip),
                     (lb.iconCls != null ? null : lb.html)
             ).appendTo(out);
         }
diff --git a/api/webapp/clientapi/ext3/PersistentToolTip.js b/api/webapp/clientapi/ext3/PersistentToolTip.js
index a65026904cc..3d02731acbf 100644
--- a/api/webapp/clientapi/ext3/PersistentToolTip.js
+++ b/api/webapp/clientapi/ext3/PersistentToolTip.js
@@ -167,7 +167,7 @@ LABKEY.ext.CalloutTip = Ext.extend(LABKEY.ext.PersistentToolTip, {
       if (!this.targetAutoEl) {
           this.targetAutoEl =
               '<span class="labkey-callout-tip' + (this.leftPlacement ? ' labkey-callout-tip-left' : '' ) + '">' +
-              '<img src="' + LABKEY.contextPath + '/_.gif">' +
+              '<img src="' + LABKEY.contextPath + '/_.gif" alt="Show details">' +
               '</span>';
       }
 
diff --git a/core/package-lock.json b/core/package-lock.json
index b780fa5c2e3..a9cfc961f64 100644
--- a/core/package-lock.json
+++ b/core/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.0.0",
       "dependencies": {
         "@labkey/components": "7.31.1",
-        "@labkey/themes": "1.8.0"
+        "@labkey/themes": "1.9.0"
       },
       "devDependencies": {
         "@labkey/build": "9.1.1",
@@ -3825,9 +3825,9 @@
       }
     },
     "node_modules/@labkey/themes": {
-      "version": "1.8.0",
-      "resolved": "https://labkey.jfrog.io/artifactory/api/npm/libs-client/@labkey/themes/-/@labkey/themes-1.8.0.tgz",
-      "integrity": "sha512-e/UgJ+Pd7+kuscsm0IJFkPH07SLcPKcHA1jfGRSdjGKYSMc6QRcBgE1/6ETAnly+39QKRukR3lNmC0w5KW/M/g==",
+      "version": "1.9.0",
+      "resolved": "https://labkey.jfrog.io/artifactory/api/npm/libs-client/@labkey/themes/-/@labkey/themes-1.9.0.tgz",
+      "integrity": "sha512-ecwSkBAcI4NqspsFCSiS1dRXh/lAtb/hHg4jyca1jl8JVosnpNfZI/XW99UTF4pwwKlVu6cDvxGeKErOJxVkvg==",
       "hasInstallScript": true,
       "license": "SEE LICENSE IN LICENSE.txt"
     },
diff --git a/core/package.json b/core/package.json
index cf17dea5062..b494f26d13f 100644
--- a/core/package.json
+++ b/core/package.json
@@ -54,7 +54,7 @@
   },
   "dependencies": {
     "@labkey/components": "7.31.1",
-    "@labkey/themes": "1.8.0"
+    "@labkey/themes": "1.9.0"
   },
   "devDependencies": {
     "@labkey/build": "9.1.1",