diff --git a/mcp/mcp_test.go b/mcp/mcp_test.go
index 7b10b30f..c12c0a1e 100644
--- a/mcp/mcp_test.go
+++ b/mcp/mcp_test.go
@@ -1971,7 +1971,7 @@ func TestKeepAliveFailure_Logged(t *testing.T) {
 		var buf bytes.Buffer
 		clientOpts := &ClientOptions{
 			KeepAlive: 50 * time.Millisecond,
-			Logger:    slog.New(slog.NewTextHandler(&buf, &slog.HandlerOptions{Level: slog.LevelError})),
+			Logger:    slog.New(slog.NewTextHandler(&buf, &slog.HandlerOptions{Level: slog.LevelWarn})),
 		}
 		c := NewClient(testImpl, clientOpts)
 		// Pin to 2025-11-25: KeepAlive uses the ping RPC, which is removed
@@ -1992,8 +1992,8 @@ func TestKeepAliveFailure_Logged(t *testing.T) {
 		synctest.Wait()
 
 		got := buf.String() // slog serializes Write calls internally
-		if !strings.Contains(got, "keepalive ping failed") {
-			t.Errorf("expected keepalive failure to be logged, got log output:\n%s", got)
+		if !strings.Contains(got, `level=WARN msg="keepalive ping failed; closing session"`) {
+			t.Errorf("expected keepalive failure to be logged at Warn, got log output:\n%s", got)
 		}
 	})
 }
diff --git a/mcp/shared.go b/mcp/shared.go
index 82a34917..8afdc20b 100644
--- a/mcp/shared.go
+++ b/mcp/shared.go
@@ -974,7 +974,7 @@ func startKeepalive(session keepaliveSession, interval time.Duration, failureThr
 				}
 				// Threshold reached; log before closing the session so the
 				// failure is observable to operators. See #218.
-				logger.Error("keepalive ping failed; closing session",
+				logger.Warn("keepalive ping failed; closing session",
 					"error", err,
 					"consecutiveFailures", consecutiveFailures,
 					"failureThreshold", failureThreshold)