diff --git a/src/config/schema/tmux.test.ts b/src/config/schema/tmux.test.ts
new file mode 100644
index 000000000..3e039b35e
--- /dev/null
+++ b/src/config/schema/tmux.test.ts
@@ -0,0 +1,25 @@
+/// <reference types="bun-types" />
+
+import { describe, expect, test } from "bun:test"
+
+import { TmuxConfigSchema, TmuxIsolationSchema } from "./tmux"
+
+describe("TmuxIsolationSchema", () => {
+  describe('#given all supported isolation values', () => {
+    test('#when parsed #then it accepts inline, window, and session', () => {
+      expect(TmuxIsolationSchema.parse("inline")).toBe("inline")
+      expect(TmuxIsolationSchema.parse("window")).toBe("window")
+      expect(TmuxIsolationSchema.parse("session")).toBe("session")
+    })
+  })
+})
+
+describe("TmuxConfigSchema", () => {
+  describe('#given tmux isolation is omitted', () => {
+    test('#when parsed #then default isolation is inline', () => {
+      const result = TmuxConfigSchema.parse({})
+
+      expect(result.isolation).toBe("inline")
+    })
+  })
+})
diff --git a/src/config/schema/tmux.ts b/src/config/schema/tmux.ts
index 77582cf40..a10edc7f9 100644
--- a/src/config/schema/tmux.ts
+++ b/src/config/schema/tmux.ts
@@ -20,7 +20,7 @@ export const TmuxConfigSchema = z.object({
   main_pane_size: z.number().min(20).max(80).default(60),
   main_pane_min_width: z.number().min(40).default(120),
   agent_pane_min_width: z.number().min(20).default(40),
-  isolation: TmuxIsolationSchema.default("session"),
+  isolation: TmuxIsolationSchema.default("inline"),
 })
 
 export type TmuxConfig = z.infer<typeof TmuxConfigSchema>