diff --git a/src/components/viewer.ts b/src/components/viewer.ts
index e31f4e7c..0084133b 100644
--- a/src/components/viewer.ts
+++ b/src/components/viewer.ts
@@ -309,6 +309,7 @@ export class Viewer {
                 break
             }
             default: {
+                data satisfies never
                 this.extension.logger.error(`Unknown websocket message: ${msg}`)
                 break
             }
diff --git a/src/providers/completion.ts b/src/providers/completion.ts
index 37882302..6d7805dd 100644
--- a/src/providers/completion.ts
+++ b/src/providers/completion.ts
@@ -210,7 +210,7 @@ export class Completer implements vscode.CompletionItemProvider {
     }
 
     private async completion(
-        type: CompletionType,
+        ctype: CompletionType,
         line: string,
         args: {
             document: vscode.TextDocument,
@@ -221,7 +221,7 @@ export class Completer implements vscode.CompletionItemProvider {
     ) {
         let reg: RegExp | undefined
         let provider: IProvider | undefined
-        switch (type) {
+        switch (ctype) {
             case 'citation':
                 reg = /(?:\\[a-zA-Z]*[Cc]ite[a-zA-Z]*\*?(?:\([^[)]*\)){0,2}(?:<[^<>]*>|\[[^[\]]*\]|{[^{}]*})*{([^}]*)$)|(?:\\bibentry{([^}]*)$)/
                 provider = this.citation
@@ -267,8 +267,9 @@ export class Completer implements vscode.CompletionItemProvider {
                 provider = this.glossary
                 break
             default:
+                ctype satisfies never
                 // This shouldn't be possible, so mark as error case in log.
-                this.extension.logger.error(`Error - trying to complete unknown type: ${inspectCompact(type)}`)
+                this.extension.logger.error(`Error - trying to complete unknown type: ${inspectCompact(ctype)}`)
                 return []
         }
         const result = line.match(reg)
diff --git a/viewer/components/extensionconnection.ts b/viewer/components/extensionconnection.ts
index 1d2e1e84..9228743e 100644
--- a/viewer/components/extensionconnection.ts
+++ b/viewer/components/extensionconnection.ts
@@ -61,6 +61,7 @@ export class ExtensionConnection {
                     break
                 }
                 default: {
+                    data satisfies never
                     break
                 }
             }
diff --git a/viewer/components/panelmanagerconnection.ts b/viewer/components/panelmanagerconnection.ts
index cd11027c..64b7d604 100644
--- a/viewer/components/panelmanagerconnection.ts
+++ b/viewer/components/panelmanagerconnection.ts
@@ -68,6 +68,7 @@ export class PanelManagerConnection {
                     break
                 }
                 default: {
+                    data satisfies never
                     break
                 }
             }