diff --git a/src/devtools/views/Components/ExpandCollapseToggle.css b/src/devtools/views/Components/ExpandCollapseToggle.css
index a686fcd1dc..38b2aa6f7e 100644
--- a/src/devtools/views/Components/ExpandCollapseToggle.css
+++ b/src/devtools/views/Components/ExpandCollapseToggle.css
@@ -1,4 +1,5 @@
 .ExpandCollapseToggle {
+  flex: 0 0 1rem;
   width: 1rem;
   height: 1rem;
   padding: 0;
diff --git a/src/devtools/views/Components/HooksTree.css b/src/devtools/views/Components/HooksTree.css
index 8eb3312b4d..819c556d36 100644
--- a/src/devtools/views/Components/HooksTree.css
+++ b/src/devtools/views/Components/HooksTree.css
@@ -57,5 +57,6 @@
 }
 
 .ExpandCollapseToggleSpacer {
+  flex: 0 0 1rem;
   width: 1rem;
 }
diff --git a/src/devtools/views/Components/KeyValue.css b/src/devtools/views/Components/KeyValue.css
index 25340bdd56..892bee1a39 100644
--- a/src/devtools/views/Components/KeyValue.css
+++ b/src/devtools/views/Components/KeyValue.css
@@ -30,5 +30,6 @@
 }
 
 .ExpandCollapseToggleSpacer {
+  flex: 0 0 1rem;
   width: 1rem;
 }