diff --git a/web/packages/design/src/Card/Card.jsx b/web/packages/design/src/Card/Card.jsx
index 95dc3f2224a94..f991499de6a62 100644
--- a/web/packages/design/src/Card/Card.jsx
+++ b/web/packages/design/src/Card/Card.jsx
@@ -26,7 +26,7 @@ const Card = styled(Box)`
 `;
 
 Card.defaultProps = {
-  theme: { darkTheme },
+  theme: darkTheme,
 };
 
 Card.displayName = 'Card';
diff --git a/web/packages/teleterm/src/mainProcess/resolveNetworkAddress.ts b/web/packages/teleterm/src/mainProcess/resolveNetworkAddress.ts
index db4c806fd7972..7c5cc03c576bb 100644
--- a/web/packages/teleterm/src/mainProcess/resolveNetworkAddress.ts
+++ b/web/packages/teleterm/src/mainProcess/resolveNetworkAddress.ts
@@ -79,7 +79,7 @@ function waitForMatchInStdout(
     const removeListeners = () => {
       process.stdout.off('data', findAddressInChunk);
       process.off('error', rejectOnError);
-      process.off('exit', rejectOnExit);
+      process.off('close', rejectOnClose);
       clearTimeout(timeout);
     };
 
@@ -97,14 +97,14 @@ function waitForMatchInStdout(
       removeListeners();
     };
 
-    const rejectOnExit = (code: number, signal: NodeJS.Signals) => {
+    const rejectOnClose = (code: number, signal: NodeJS.Signals) => {
       const codeOrSignal = [
         // code can be 0, so we cannot just check it the same way as the signal.
         code != null && `code ${code}`,
         signal && `signal ${signal}`,
       ]
         .filter(Boolean)
-        .join(' and ');
+        .join(' ');
       const details = codeOrSignal ? ` with ${codeOrSignal}` : '';
       rejectOnError(
         new ResolveError(
@@ -117,7 +117,11 @@ function waitForMatchInStdout(
 
     process.stdout.on('data', findAddressInChunk);
     process.on('error', rejectOnError);
-    process.on('exit', rejectOnExit);
+    // Listen for close instead of exit. This doesn't make much difference in prod usage, but it's
+    // meaningful in tests. testProcess.mjs exits soon after printing to stdout, so we have to make
+    // sure that stdio streams are closed to avoid process.on('exit') being processed before
+    // stdout.on('data').
+    process.on('close', rejectOnClose);
   });
 }
 
diff --git a/web/packages/teleterm/src/ui/App.tsx b/web/packages/teleterm/src/ui/App.tsx
index c96f35c28f72c..25889987f293a 100644
--- a/web/packages/teleterm/src/ui/App.tsx
+++ b/web/packages/teleterm/src/ui/App.tsx
@@ -26,7 +26,8 @@ import { AppInitializer } from 'teleterm/ui/AppInitializer';
 import CatchError from './components/CatchError';
 import AppContextProvider from './appContextProvider';
 import AppContext from './appContext';
-import { ThemeProvider } from './ThemeProvider';
+import { StaticThemeProvider, ThemeProvider } from './ThemeProvider';
+import { darkTheme } from './ThemeProvider/theme';
 
 export const App: React.FC<{ ctx: AppContext }> = ({ ctx }) => {
   return (
@@ -47,7 +48,9 @@ export const App: React.FC<{ ctx: AppContext }> = ({ ctx }) => {
 export const FailedApp = (props: { message: string }) => {
   return (
     <StyledApp>
-      <Failed alignSelf={'baseline'} message={props.message} />
+      <StaticThemeProvider theme={darkTheme}>
+        <Failed alignSelf={'baseline'} message={props.message} />
+      </StaticThemeProvider>
     </StyledApp>
   );
 };