diff --git a/src/plugin-handlers/prometheus-agent-config-builder.test.ts b/src/plugin-handlers/prometheus-agent-config-builder.test.ts
index e6440834a..e01403289 100644
--- a/src/plugin-handlers/prometheus-agent-config-builder.test.ts
+++ b/src/plugin-handlers/prometheus-agent-config-builder.test.ts
@@ -1,4 +1,8 @@
-import { describe, expect, test, spyOn, afterEach, beforeEach } from "bun:test";
+import { describe, expect, test, spyOn, afterEach, beforeEach, mock } from "bun:test";
+
+// Isolate from other tests that mock.module the logger (CI cross-contamination fix)
+mock.module("../shared/logger", () => ({ log: (..._args: unknown[]) => {} }))
+
 import { buildPrometheusAgentConfig } from "./prometheus-agent-config-builder";
 import * as shared from "../shared";
 import * as categoryResolver from "./category-config-resolver";
diff --git a/src/shared/model-resolver.test.ts b/src/shared/model-resolver.test.ts
index 23a02c132..292aac718 100644
--- a/src/shared/model-resolver.test.ts
+++ b/src/shared/model-resolver.test.ts
@@ -1,4 +1,8 @@
 import { describe, expect, test, spyOn, beforeEach, afterEach, mock } from "bun:test"
+
+// Isolate from other tests that mock.module the logger (CI cross-contamination fix)
+mock.module("./logger", () => ({ log: (..._args: unknown[]) => {} }))
+
 import { resolveModel, resolveModelWithFallback, type ModelResolutionInput, type ExtendedModelResolutionInput, type ModelResolutionResult, type ModelSource } from "./model-resolver"
 import * as logger from "./logger"
 import * as connectedProvidersCache from "./connected-providers-cache"