Fix unit tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/features/preferences/__snapshots__/urls-of-legacy-extensions.test.tsx.snap

@@ -3,6 +3,9 @@
 exports[`preferences: URLs of legacy extensions given extension with both custom preference tabs and content for the default tab when navigating to specific custom preference tab using magic string URL renders 1`] = `
 <body>
   <div>
+    <div
+      id="terminal-init"
+    />
     <div
       class="ClusterManager"
     >
@@ -432,6 +435,9 @@ exports[`preferences: URLs of legacy extensions given extension with both custom
 exports[`preferences: URLs of legacy extensions given extension with both custom preference tabs and content for the default tab when navigating to unspecified custom preferences tab using magic string URL renders 1`] = `
 <body>
   <div>
+    <div
+      id="terminal-init"
+    />
     <div
       class="ClusterManager"
     >
@@ -861,6 +867,9 @@ exports[`preferences: URLs of legacy extensions given extension with both custom
 exports[`preferences: URLs of legacy extensions given extension with custom preferences and a custom preference tab when navigating to specific custom preference tab using magic string URL renders 1`] = `
 <body>
   <div>
+    <div
+      id="terminal-init"
+    />
     <div
       class="ClusterManager"
     >
@@ -1252,6 +1261,9 @@ exports[`preferences: URLs of legacy extensions given extension with custom pref
 exports[`preferences: URLs of legacy extensions given extension with custom preferences and a custom preference tab when navigating to unspecified custom preferences tab using magic string URL renders 1`] = `
 <body>
   <div>
+    <div
+      id="terminal-init"
+    />
     <div
       class="ClusterManager"
     >
@@ -1617,6 +1629,9 @@ exports[`preferences: URLs of legacy extensions given extension with custom pref
 exports[`preferences: URLs of legacy extensions given extension with custom preferences but without a custom preference tab when navigating to the default preference tab using magic string URL renders 1`] = `
 <body>
   <div>
+    <div
+      id="terminal-init"
+    />
     <div
       class="ClusterManager"
     >

src/features/preferences/urls-of-legacy-extensions.test.tsx

@@ -18,6 +18,10 @@ describe("preferences: URLs of legacy extensions", () => {
     builder = getApplicationBuilder();
   });
 
+  afterEach(() => {
+    builder.quit();
+  });
+
   describe("given extension with custom preferences and a custom preference tab", () => {
     let rendered: RenderResult;
     let discover: Discover;