diff --git a/.changeset/hip-buses-eat.md b/.changeset/hip-buses-eat.md
new file mode 100644
index 00000000000..8e9e703d996
--- /dev/null
+++ b/.changeset/hip-buses-eat.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+Change `createSlots` to use layout effects when registering slots
diff --git a/src/__tests__/__snapshots__/CheckboxGroup.test.tsx.snap b/src/__tests__/__snapshots__/CheckboxGroup.test.tsx.snap
index 6b91387659b..8f762d1c513 100644
--- a/src/__tests__/__snapshots__/CheckboxGroup.test.tsx.snap
+++ b/src/__tests__/__snapshots__/CheckboxGroup.test.tsx.snap
@@ -12,19 +12,46 @@ exports[`CheckboxGroup renders consistently 1`] = `
   padding: 0;
 }
 
-.c3 {
+.c4 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
   display: flex;
 }
 
-.c4 > input {
+.c5 > input {
   margin-left: 0;
   margin-right: 0;
 }
 
+.c7 {
+  margin-left: 8px;
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+}
+
 .c2 {
+  display: block;
+  font-size: 16px;
+}
+
+.c8 {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+  color: #24292f;
+  cursor: pointer;
+  -webkit-align-self: flex-start;
+  -ms-flex-item-align: start;
+  align-self: flex-start;
+}
+
+.c3 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -37,25 +64,25 @@ exports[`CheckboxGroup renders consistently 1`] = `
   padding: 0;
 }
 
-.c2 > * + * {
+.c3 > * + * {
   margin-top: 8px;
 }
 
-.c5 {
+.c6 {
   cursor: pointer;
 }
 
-.c5:focus:not(:disabled) {
+.c6:focus:not(:disabled) {
   box-shadow: none;
   outline: 2px solid #0969da;
   outline-offset: 0;
 }
 
-.c5:focus:not(:disabled):not(:focus-visible) {
+.c6:focus:not(:disabled):not(:focus-visible) {
   outline: solid 1px transparent;
 }
 
-.c5:focus-visible:not(:disabled) {
+.c6:focus-visible:not(:disabled) {
   box-shadow: none;
   outline: 2px solid #0969da;
   outline-offset: 0;
@@ -68,23 +95,29 @@ exports[`CheckboxGroup renders consistently 1`] = `
   >
     <legend
       className="c1"
-    />
+    >
+      <span
+        className="c2"
+      >
+        Choices
+      </span>
+    </legend>
     <div
-      className="c2"
+      className="c3"
     >
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-2"
             name="one"
             onChange={[Function]}
@@ -92,20 +125,31 @@ exports[`CheckboxGroup renders consistently 1`] = `
             value="one"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-2"
+          >
+            Choice one
+          </label>
+        </div>
       </div>
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-3"
             name="two"
             onChange={[Function]}
@@ -113,20 +157,31 @@ exports[`CheckboxGroup renders consistently 1`] = `
             value="two"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-3"
+          >
+            Choice two
+          </label>
+        </div>
       </div>
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-4"
             name="three"
             onChange={[Function]}
@@ -134,6 +189,17 @@ exports[`CheckboxGroup renders consistently 1`] = `
             value="three"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-4"
+          >
+            Choice three
+          </label>
+        </div>
       </div>
     </div>
   </fieldset>
diff --git a/src/__tests__/__snapshots__/CheckboxOrRadioGroup.test.tsx.snap b/src/__tests__/__snapshots__/CheckboxOrRadioGroup.test.tsx.snap
index c7b60faf0b8..035bafc69c7 100644
--- a/src/__tests__/__snapshots__/CheckboxOrRadioGroup.test.tsx.snap
+++ b/src/__tests__/__snapshots__/CheckboxOrRadioGroup.test.tsx.snap
@@ -12,19 +12,46 @@ exports[`CheckboxOrRadioGroup renders consistently 1`] = `
   padding: 0;
 }
 
-.c3 {
+.c4 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
   display: flex;
 }
 
-.c4 > input {
+.c5 > input {
   margin-left: 0;
   margin-right: 0;
 }
 
+.c7 {
+  margin-left: 8px;
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+}
+
 .c2 {
+  display: block;
+  font-size: 16px;
+}
+
+.c8 {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+  color: #24292f;
+  cursor: pointer;
+  -webkit-align-self: flex-start;
+  -ms-flex-item-align: start;
+  align-self: flex-start;
+}
+
+.c3 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -37,25 +64,25 @@ exports[`CheckboxOrRadioGroup renders consistently 1`] = `
   padding: 0;
 }
 
-.c2 > * + * {
+.c3 > * + * {
   margin-top: 8px;
 }
 
-.c5 {
+.c6 {
   cursor: pointer;
 }
 
-.c5:focus:not(:disabled) {
+.c6:focus:not(:disabled) {
   box-shadow: none;
   outline: 2px solid #0969da;
   outline-offset: 0;
 }
 
-.c5:focus:not(:disabled):not(:focus-visible) {
+.c6:focus:not(:disabled):not(:focus-visible) {
   outline: solid 1px transparent;
 }
 
-.c5:focus-visible:not(:disabled) {
+.c6:focus-visible:not(:disabled) {
   box-shadow: none;
   outline: 2px solid #0969da;
   outline-offset: 0;
@@ -68,23 +95,29 @@ exports[`CheckboxOrRadioGroup renders consistently 1`] = `
   >
     <legend
       className="c1"
-    />
+    >
+      <span
+        className="c2"
+      >
+        Choices
+      </span>
+    </legend>
     <div
-      className="c2"
+      className="c3"
     >
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-2"
             name="radioInput"
             onChange={[Function]}
@@ -92,20 +125,31 @@ exports[`CheckboxOrRadioGroup renders consistently 1`] = `
             value="choiceOne"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-2"
+          >
+            Choice one
+          </label>
+        </div>
       </div>
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-3"
             name="radioInput"
             onChange={[Function]}
@@ -113,20 +157,31 @@ exports[`CheckboxOrRadioGroup renders consistently 1`] = `
             value="choiceTwo"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-3"
+          >
+            Choice two
+          </label>
+        </div>
       </div>
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-4"
             name="radioInput"
             onChange={[Function]}
@@ -134,6 +189,17 @@ exports[`CheckboxOrRadioGroup renders consistently 1`] = `
             value="choiceThree"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-4"
+          >
+            Choice three
+          </label>
+        </div>
       </div>
     </div>
   </fieldset>
diff --git a/src/__tests__/__snapshots__/RadioGroup.test.tsx.snap b/src/__tests__/__snapshots__/RadioGroup.test.tsx.snap
index f4e59c352ff..a26bf50a45f 100644
--- a/src/__tests__/__snapshots__/RadioGroup.test.tsx.snap
+++ b/src/__tests__/__snapshots__/RadioGroup.test.tsx.snap
@@ -12,19 +12,46 @@ exports[`RadioGroup renders consistently 1`] = `
   padding: 0;
 }
 
-.c3 {
+.c4 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
   display: flex;
 }
 
-.c4 > input {
+.c5 > input {
   margin-left: 0;
   margin-right: 0;
 }
 
+.c7 {
+  margin-left: 8px;
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+}
+
 .c2 {
+  display: block;
+  font-size: 16px;
+}
+
+.c8 {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+  color: #24292f;
+  cursor: pointer;
+  -webkit-align-self: flex-start;
+  -ms-flex-item-align: start;
+  align-self: flex-start;
+}
+
+.c3 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -37,25 +64,25 @@ exports[`RadioGroup renders consistently 1`] = `
   padding: 0;
 }
 
-.c2 > * + * {
+.c3 > * + * {
   margin-top: 8px;
 }
 
-.c5 {
+.c6 {
   cursor: pointer;
 }
 
-.c5:focus:not(:disabled) {
+.c6:focus:not(:disabled) {
   box-shadow: none;
   outline: 2px solid #0969da;
   outline-offset: 0;
 }
 
-.c5:focus:not(:disabled):not(:focus-visible) {
+.c6:focus:not(:disabled):not(:focus-visible) {
   outline: solid 1px transparent;
 }
 
-.c5:focus-visible:not(:disabled) {
+.c6:focus-visible:not(:disabled) {
   box-shadow: none;
   outline: 2px solid #0969da;
   outline-offset: 0;
@@ -68,23 +95,29 @@ exports[`RadioGroup renders consistently 1`] = `
   >
     <legend
       className="c1"
-    />
+    >
+      <span
+        className="c2"
+      >
+        Choices
+      </span>
+    </legend>
     <div
-      className="c2"
+      className="c3"
     >
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-2"
             name="choices"
             onChange={[Function]}
@@ -92,20 +125,31 @@ exports[`RadioGroup renders consistently 1`] = `
             value="one"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-2"
+          >
+            Choice one
+          </label>
+        </div>
       </div>
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-3"
             name="choices"
             onChange={[Function]}
@@ -113,20 +157,31 @@ exports[`RadioGroup renders consistently 1`] = `
             value="two"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-3"
+          >
+            Choice two
+          </label>
+        </div>
       </div>
       <div
-        className="c3"
+        className="c4"
         display="flex"
       >
         <div
-          className="c4"
+          className="c5"
         >
           <input
             aria-checked="false"
             aria-disabled="false"
             aria-invalid="false"
             aria-required="false"
-            className="c5"
+            className="c6"
             id="react-aria-4"
             name="choices"
             onChange={[Function]}
@@ -134,6 +189,17 @@ exports[`RadioGroup renders consistently 1`] = `
             value="three"
           />
         </div>
+        <div
+          className="c7"
+          display="flex"
+        >
+          <label
+            className="c8"
+            htmlFor="react-aria-4"
+          >
+            Choice three
+          </label>
+        </div>
       </div>
     </div>
   </fieldset>
diff --git a/src/__tests__/deprecated/__snapshots__/ChoiceFieldset.test.tsx.snap b/src/__tests__/deprecated/__snapshots__/ChoiceFieldset.test.tsx.snap
index 8acc1d06fad..ffd119d38a6 100644
--- a/src/__tests__/deprecated/__snapshots__/ChoiceFieldset.test.tsx.snap
+++ b/src/__tests__/deprecated/__snapshots__/ChoiceFieldset.test.tsx.snap
@@ -651,14 +651,209 @@ exports[`ChoiceFieldset renders a list with selected items 1`] = `
   border: none;
 }
 
+.c1 {
+  margin-bottom: 16px;
+}
+
+.c4 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+}
+
+.c5 > input {
+  margin-left: 0;
+  margin-right: 0;
+}
+
+.c7 {
+  margin-left: 8px;
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+}
+
+.c2 {
+  font-size: 16px;
+  padding: 0;
+}
+
+.c8 {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+  color: #24292f;
+  cursor: pointer;
+  -webkit-align-self: flex-start;
+  -ms-flex-item-align: start;
+  align-self: flex-start;
+}
+
+.c6 {
+  cursor: pointer;
+}
+
+.c6:focus:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c6:focus:not(:disabled):not(:focus-visible) {
+  outline: solid 1px transparent;
+}
+
+.c6:focus-visible:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c3 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+.c3 > li + li {
+  margin-top: 8px;
+}
+
 <div>
   <fieldset
     aria-describedby=""
     className="c0"
   >
     <div
-      className=""
-    />
+      className="c1"
+    >
+      <legend
+        className="c2"
+      >
+        Legend
+      </legend>
+    </div>
+    <ul
+      className="c3"
+    >
+      <li>
+        <div
+          className="c4"
+          display="flex"
+        >
+          <div
+            className="c5"
+          >
+            <input
+              aria-checked="true"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={true}
+              className="c6"
+              id="react-aria-3"
+              name="labelOne"
+              onChange={[Function]}
+              type="checkbox"
+              value="labelOne"
+            />
+          </div>
+          <div
+            className="c7"
+            display="flex"
+          >
+            <label
+              className="c8"
+              htmlFor="react-aria-3"
+            >
+              Label one
+            </label>
+          </div>
+        </div>
+      </li>
+      <li>
+        <div
+          className="c4"
+          display="flex"
+        >
+          <div
+            className="c5"
+          >
+            <input
+              aria-checked="true"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={true}
+              className="c6"
+              id="react-aria-4"
+              name="labelTwo"
+              onChange={[Function]}
+              type="checkbox"
+              value="labelTwo"
+            />
+          </div>
+          <div
+            className="c7"
+            display="flex"
+          >
+            <label
+              className="c8"
+              htmlFor="react-aria-4"
+            >
+              Label two
+            </label>
+          </div>
+        </div>
+      </li>
+      <li>
+        <div
+          className="c4"
+          display="flex"
+        >
+          <div
+            className="c5"
+          >
+            <input
+              aria-checked="false"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={false}
+              className="c6"
+              id="react-aria-5"
+              name="labelThree"
+              onChange={[Function]}
+              type="checkbox"
+              value="labelThree"
+            />
+          </div>
+          <div
+            className="c7"
+            display="flex"
+          >
+            <label
+              className="c8"
+              htmlFor="react-aria-5"
+            >
+              Label three
+            </label>
+          </div>
+        </div>
+      </li>
+    </ul>
   </fieldset>
 </div>
 `;
@@ -670,42 +865,459 @@ exports[`ChoiceFieldset renders a required fieldset 1`] = `
   border: none;
 }
 
+.c1 {
+  margin-bottom: 16px;
+}
+
+.c3 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+}
+
+.c6 > input {
+  margin-left: 0;
+  margin-right: 0;
+}
+
+.c8 {
+  margin-left: 8px;
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+}
+
+.c4 {
+  margin-right: 4px;
+}
+
+.c2 {
+  font-size: 16px;
+  padding: 0;
+}
+
+.c9 {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+  color: #24292f;
+  cursor: pointer;
+  -webkit-align-self: flex-start;
+  -ms-flex-item-align: start;
+  align-self: flex-start;
+}
+
+.c7 {
+  cursor: pointer;
+}
+
+.c7:focus:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c7:focus:not(:disabled):not(:focus-visible) {
+  outline: solid 1px transparent;
+}
+
+.c7:focus-visible:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c5 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+.c5 > li + li {
+  margin-top: 8px;
+}
+
+<div>
+  <fieldset
+    aria-describedby=""
+    className="c0"
+  >
+    <div
+      className="c1"
+    >
+      <legend
+        className="c2"
+        title="required field"
+      >
+        <span
+          className="c3"
+          display="flex"
+        >
+          <div
+            className="c4"
+          >
+            Legend
+          </div>
+          <span>
+            *
+          </span>
+        </span>
+      </legend>
+    </div>
+    <ul
+      className="c5"
+    >
+      <li>
+        <div
+          className="c3"
+          display="flex"
+        >
+          <div
+            className="c6"
+          >
+            <input
+              aria-checked="false"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={false}
+              className="c7"
+              id="react-aria-3"
+              name="react-aria-2"
+              onChange={[Function]}
+              type="radio"
+              value="labelOne"
+            />
+          </div>
+          <div
+            className="c8"
+            display="flex"
+          >
+            <label
+              className="c9"
+              htmlFor="react-aria-3"
+            >
+              Label one
+            </label>
+          </div>
+        </div>
+      </li>
+      <li>
+        <div
+          className="c3"
+          display="flex"
+        >
+          <div
+            className="c6"
+          >
+            <input
+              aria-checked="false"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={false}
+              className="c7"
+              id="react-aria-4"
+              name="react-aria-2"
+              onChange={[Function]}
+              type="radio"
+              value="labelTwo"
+            />
+          </div>
+          <div
+            className="c8"
+            display="flex"
+          >
+            <label
+              className="c9"
+              htmlFor="react-aria-4"
+            >
+              Label two
+            </label>
+          </div>
+        </div>
+      </li>
+    </ul>
+  </fieldset>
+</div>
+`;
+
+exports[`ChoiceFieldset renders default 1`] = `
+.c0 {
+  margin: 0;
+  padding: 0;
+  border: none;
+}
+
+.c1 {
+  margin-bottom: 16px;
+}
+
+.c4 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+}
+
+.c5 > input {
+  margin-left: 0;
+  margin-right: 0;
+}
+
+.c7 {
+  margin-left: 8px;
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+}
+
+.c2 {
+  font-size: 16px;
+  padding: 0;
+}
+
+.c8 {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+  color: #24292f;
+  cursor: pointer;
+  -webkit-align-self: flex-start;
+  -ms-flex-item-align: start;
+  align-self: flex-start;
+}
+
+.c6 {
+  cursor: pointer;
+}
+
+.c6:focus:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c6:focus:not(:disabled):not(:focus-visible) {
+  outline: solid 1px transparent;
+}
+
+.c6:focus-visible:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c3 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+.c3 > li + li {
+  margin-top: 8px;
+}
+
 <div>
   <fieldset
     aria-describedby=""
     className="c0"
   >
     <div
-      className=""
-    />
+      className="c1"
+    >
+      <legend
+        className="c2"
+      >
+        Legend
+      </legend>
+    </div>
+    <ul
+      className="c3"
+    >
+      <li>
+        <div
+          className="c4"
+          display="flex"
+        >
+          <div
+            className="c5"
+          >
+            <input
+              aria-checked="false"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={false}
+              className="c6"
+              id="react-aria-3"
+              name="react-aria-2"
+              onChange={[Function]}
+              type="radio"
+              value="labelOne"
+            />
+          </div>
+          <div
+            className="c7"
+            display="flex"
+          >
+            <label
+              className="c8"
+              htmlFor="react-aria-3"
+            >
+              Label one
+            </label>
+          </div>
+        </div>
+      </li>
+      <li>
+        <div
+          className="c4"
+          display="flex"
+        >
+          <div
+            className="c5"
+          >
+            <input
+              aria-checked="false"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={false}
+              className="c6"
+              id="react-aria-4"
+              name="react-aria-2"
+              onChange={[Function]}
+              type="radio"
+              value="labelTwo"
+            />
+          </div>
+          <div
+            className="c7"
+            display="flex"
+          >
+            <label
+              className="c8"
+              htmlFor="react-aria-4"
+            >
+              Label two
+            </label>
+          </div>
+        </div>
+      </li>
+    </ul>
   </fieldset>
 </div>
 `;
 
-exports[`ChoiceFieldset renders default 1`] = `
+exports[`ChoiceFieldset renders with a custom name and id passed 1`] = `
 .c0 {
   margin: 0;
   padding: 0;
   border: none;
 }
 
-<div>
-  <fieldset
-    aria-describedby=""
-    className="c0"
-  >
-    <div
-      className=""
-    />
-  </fieldset>
-</div>
-`;
+.c1 {
+  margin-bottom: 16px;
+}
 
-exports[`ChoiceFieldset renders with a custom name and id passed 1`] = `
-.c0 {
+.c4 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+}
+
+.c5 > input {
+  margin-left: 0;
+  margin-right: 0;
+}
+
+.c7 {
+  margin-left: 8px;
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+}
+
+.c2 {
+  font-size: 16px;
+  padding: 0;
+}
+
+.c8 {
+  font-weight: 600;
+  font-size: 14px;
+  display: block;
+  color: #24292f;
+  cursor: pointer;
+  -webkit-align-self: flex-start;
+  -ms-flex-item-align: start;
+  align-self: flex-start;
+}
+
+.c6 {
+  cursor: pointer;
+}
+
+.c6:focus:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c6:focus:not(:disabled):not(:focus-visible) {
+  outline: solid 1px transparent;
+}
+
+.c6:focus-visible:not(:disabled) {
+  box-shadow: none;
+  outline: 2px solid #0969da;
+  outline-offset: 0;
+}
+
+.c3 {
+  display: -webkit-box;
+  display: -webkit-flex;
+  display: -ms-flexbox;
+  display: flex;
+  -webkit-flex-direction: column;
+  -ms-flex-direction: column;
+  flex-direction: column;
+  list-style: none;
   margin: 0;
   padding: 0;
-  border: none;
+}
+
+.c3 > li + li {
+  margin-top: 8px;
 }
 
 <div>
@@ -714,8 +1326,88 @@ exports[`ChoiceFieldset renders with a custom name and id passed 1`] = `
     className="c0"
   >
     <div
-      className=""
-    />
+      className="c1"
+    >
+      <legend
+        className="c2"
+      >
+        Legend
+      </legend>
+    </div>
+    <ul
+      className="c3"
+    >
+      <li>
+        <div
+          className="c4"
+          display="flex"
+        >
+          <div
+            className="c5"
+          >
+            <input
+              aria-checked="false"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={false}
+              className="c6"
+              id="react-aria-2"
+              name="radioGroup"
+              onChange={[Function]}
+              type="radio"
+              value="labelOne"
+            />
+          </div>
+          <div
+            className="c7"
+            display="flex"
+          >
+            <label
+              className="c8"
+              htmlFor="react-aria-2"
+            >
+              Label one
+            </label>
+          </div>
+        </div>
+      </li>
+      <li>
+        <div
+          className="c4"
+          display="flex"
+        >
+          <div
+            className="c5"
+          >
+            <input
+              aria-checked="false"
+              aria-disabled="false"
+              aria-invalid="false"
+              aria-required="false"
+              checked={false}
+              className="c6"
+              id="react-aria-3"
+              name="radioGroup"
+              onChange={[Function]}
+              type="radio"
+              value="labelTwo"
+            />
+          </div>
+          <div
+            className="c7"
+            display="flex"
+          >
+            <label
+              className="c8"
+              htmlFor="react-aria-3"
+            >
+              Label two
+            </label>
+          </div>
+        </div>
+      </li>
+    </ul>
   </fieldset>
 </div>
 `;
diff --git a/src/utils/create-slots.tsx b/src/utils/create-slots.tsx
index 9489a43c1d9..2a1b51eec7c 100644
--- a/src/utils/create-slots.tsx
+++ b/src/utils/create-slots.tsx
@@ -1,5 +1,6 @@
 import React from 'react'
 import {useForceUpdate} from './use-force-update'
+import useLayoutEffect from './useIsomorphicLayoutEffect'
 
 /** createSlots is a factory that can create a
  *  typesafe Slots + Slot pair to use in a component definition
@@ -42,7 +43,7 @@ const createSlots = <SlotNames extends string>(slotNames: SlotNames[]) => {
     const [isMounted, setIsMounted] = React.useState(false)
 
     // fires after all the effects in children
-    React.useEffect(() => {
+    useLayoutEffect(() => {
       rerenderWithSlots()
       setIsMounted(true)
     }, [rerenderWithSlots])
@@ -86,7 +87,7 @@ const createSlots = <SlotNames extends string>(slotNames: SlotNames[]) => {
   > = ({name, children}) => {
     const {registerSlot, unregisterSlot, context} = React.useContext(SlotsContext)
 
-    React.useEffect(() => {
+    useLayoutEffect(() => {
       registerSlot(name, typeof children === 'function' ? children(context) : children)
       return () => unregisterSlot(name)
     }, [name, children, registerSlot, unregisterSlot, context])