diff --git a/slackme/main.test.ts b/slackme/main.test.ts
index 402a690..eca4f5d 100644
--- a/slackme/main.test.ts
+++ b/slackme/main.test.ts
@@ -126,7 +126,10 @@ const assertSlackMessage = async (opts: {
   durationMS?: number;
   output: string;
 }) => {
-  let url: URL;
+  // Have to use non-null assertion because TS can't tell when the fetch
+  // function will run
+  let url!: URL;
+
   const fakeSlackHost = serve({
     fetch: (req) => {
       url = new URL(req.url);
@@ -138,15 +141,16 @@ const assertSlackMessage = async (opts: {
     },
     port: 0,
   });
+
   const { instance, id } = await setupContainer(
     "alpine/curl",
-    opts.format && {
-      slack_message: opts.format,
-    },
+    opts.format ? { slack_message: opts.format } : undefined,
   );
+
   await writeCoder(id, "echo 'token'");
   let exec = await execContainer(id, ["sh", "-c", instance.script]);
   expect(exec.exitCode).toBe(0);
+
   exec = await execContainer(id, [
     "sh",
     "-c",
@@ -154,6 +158,7 @@ const assertSlackMessage = async (opts: {
       fakeSlackHost.hostname
     }:${fakeSlackHost.port}" slackme ${opts.command}`,
   ]);
+
   expect(exec.stderr.trim()).toBe("");
   expect(url.pathname).toEqual("/api/chat.postMessage");
   expect(url.searchParams.get("channel")).toEqual("token");
diff --git a/test.ts b/test.ts
index b338205..41eb9c1 100644
--- a/test.ts
+++ b/test.ts
@@ -149,19 +149,25 @@ export const testRequiredVariables = <TVars extends Record<string, string>>(
   it("required variables", async () => {
     await runTerraformApply(dir, vars);
   });
+
   const varNames = Object.keys(vars);
   varNames.forEach((varName) => {
     // Ensures that every variable provided is required!
     it("missing variable " + varName, async () => {
-      const localVars = {};
+      const localVars: Record<string, string> = {};
       varNames.forEach((otherVarName) => {
         if (otherVarName !== varName) {
           localVars[otherVarName] = vars[otherVarName];
         }
       });
+
       try {
         await runTerraformApply(dir, localVars);
       } catch (ex) {
+        if (!(ex instanceof Error)) {
+          throw new Error("Unknown error generated");
+        }
+
         expect(ex.message).toContain(
           `input variable \"${varName}\" is not set`,
         );
diff --git a/tsconfig.json b/tsconfig.json
index e7b89cd..dd38e58 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,6 +2,7 @@
   "compilerOptions": {
     "target": "esnext",
     "module": "esnext",
+    "strict": true,
     "allowSyntheticDefaultImports": true,
     "moduleResolution": "nodenext",
     "types": ["bun-types"]
diff --git a/vscode-desktop/main.test.ts b/vscode-desktop/main.test.ts
index 74c4ffb..207b492 100644
--- a/vscode-desktop/main.test.ts
+++ b/vscode-desktop/main.test.ts
@@ -24,9 +24,10 @@ describe("vscode-desktop", async () => {
     const coder_app = state.resources.find(
       (res) => res.type == "coder_app" && res.name == "vscode",
     );
+
     expect(coder_app).not.toBeNull();
-    expect(coder_app.instances.length).toBe(1);
-    expect(coder_app.instances[0].attributes.order).toBeNull();
+    expect(coder_app?.instances.length).toBe(1);
+    expect(coder_app?.instances[0].attributes.order).toBeNull();
   });
 
   it("adds folder", async () => {
@@ -80,8 +81,9 @@ describe("vscode-desktop", async () => {
     const coder_app = state.resources.find(
       (res) => res.type == "coder_app" && res.name == "vscode",
     );
+
     expect(coder_app).not.toBeNull();
-    expect(coder_app.instances.length).toBe(1);
-    expect(coder_app.instances[0].attributes.order).toBe(22);
+    expect(coder_app?.instances.length).toBe(1);
+    expect(coder_app?.instances[0].attributes.order).toBe(22);
   });
 });
diff --git a/windows-rdp/main.test.ts b/windows-rdp/main.test.ts
index 24ce104..80cbfbe 100644
--- a/windows-rdp/main.test.ts
+++ b/windows-rdp/main.test.ts
@@ -99,11 +99,11 @@ describe("Web RDP", async () => {
     const defaultRdpScript = findWindowsRdpScript(defaultState);
     expect(defaultRdpScript).toBeString();
 
-    const { username: defaultUsername, password: defaultPassword } =
-      formEntryValuesRe.exec(defaultRdpScript)?.groups ?? {};
+    const defaultResultsGroup =
+      formEntryValuesRe.exec(defaultRdpScript ?? "")?.groups ?? {};
 
-    expect(defaultUsername).toBe("Administrator");
-    expect(defaultPassword).toBe("coderRDP!");
+    expect(defaultResultsGroup.username).toBe("Administrator");
+    expect(defaultResultsGroup.password).toBe("coderRDP!");
 
     // Test that custom usernames/passwords are also forwarded correctly
     const customAdminUsername = "crouton";
@@ -121,10 +121,10 @@ describe("Web RDP", async () => {
     const customRdpScript = findWindowsRdpScript(customizedState);
     expect(customRdpScript).toBeString();
 
-    const { username: customUsername, password: customPassword } =
-      formEntryValuesRe.exec(customRdpScript)?.groups ?? {};
+    const customResultsGroup =
+      formEntryValuesRe.exec(customRdpScript ?? "")?.groups ?? {};
 
-    expect(customUsername).toBe(customAdminUsername);
-    expect(customPassword).toBe(customAdminPassword);
+    expect(customResultsGroup.username).toBe(customAdminUsername);
+    expect(customResultsGroup.password).toBe(customAdminPassword);
   });
 });