diff --git a/libs/standard-tests/langchain_tests/integration_tests/sandboxes.py b/libs/standard-tests/langchain_tests/integration_tests/sandboxes.py
index c4d2484c830..72c7d0e4d00 100644
--- a/libs/standard-tests/langchain_tests/integration_tests/sandboxes.py
+++ b/libs/standard-tests/langchain_tests/integration_tests/sandboxes.py
@@ -32,6 +32,7 @@ class TestMySandboxStandard(SandboxIntegrationTests):
 
 from __future__ import annotations
 
+import base64
 from abc import abstractmethod
 from typing import TYPE_CHECKING
 
@@ -42,6 +43,7 @@ deepagents = pytest.importorskip("deepagents")
 from deepagents.backends.protocol import (
     FileDownloadResponse,
     FileUploadResponse,
+    ReadResult,
     SandboxBackendProtocol,
 )
 
@@ -110,8 +112,27 @@ class SandboxIntegrationTests(BaseStandardTests):
         content = "Line 1\nLine 2\nLine 3"
         sandbox_backend.write(test_path, content)
         result = sandbox_backend.read(test_path)
-        assert "Error:" not in result
-        assert all(line in result for line in ("Line 1", "Line 2", "Line 3"))
+        assert isinstance(result, ReadResult)
+        assert result.error is None
+        assert result.file_data is not None
+        assert all(
+            line in result.file_data["content"]
+            for line in ("Line 1", "Line 2", "Line 3")
+        )
+
+    def test_read_binary_file(self, sandbox_backend: SandboxBackendProtocol) -> None:
+        """Upload a binary file and verify `read()` returns base64-encoded content."""
+        if not self.has_sync:
+            pytest.skip("Sync tests not supported.")
+        test_path = "/tmp/test_sandbox_ops/binary.png"
+        raw_bytes = bytes(range(256))
+        sandbox_backend.upload_files([(test_path, raw_bytes)])
+        result = sandbox_backend.read(test_path)
+        assert isinstance(result, ReadResult)
+        assert result.error is None
+        assert result.file_data is not None
+        assert result.file_data["encoding"] == "base64"
+        assert base64.b64decode(result.file_data["content"]) == raw_bytes
 
     def test_edit_single_occurrence(
         self, sandbox_backend: SandboxBackendProtocol
@@ -125,39 +146,48 @@ class SandboxIntegrationTests(BaseStandardTests):
         result = sandbox_backend.edit(test_path, "Goodbye", "Farewell")
         assert result.error is None
         assert result.occurrences == 1
-        file_content = sandbox_backend.read(test_path)
-        assert "Farewell world" in file_content
-        assert "Goodbye" not in file_content
+        file_result = sandbox_backend.read(test_path)
+        assert isinstance(file_result, ReadResult)
+        assert file_result.error is None
+        assert file_result.file_data is not None
+        assert "Farewell world" in file_result.file_data["content"]
+        assert "Goodbye" not in file_result.file_data["content"]
 
-    def test_ls_info_lists_files(self, sandbox_backend: SandboxBackendProtocol) -> None:
-        """Create files and verify `ls_info()` lists them."""
+    def test_ls_lists_files(self, sandbox_backend: SandboxBackendProtocol) -> None:
+        """Create files and verify `ls()` lists them."""
         if not self.has_sync:
             pytest.skip("Sync tests not supported.")
         sandbox_backend.write("/tmp/test_sandbox_ops/a.txt", "a")
         sandbox_backend.write("/tmp/test_sandbox_ops/b.txt", "b")
-        info = sandbox_backend.ls_info("/tmp/test_sandbox_ops")
-        paths = sorted([i["path"] for i in info])
+        result = sandbox_backend.ls("/tmp/test_sandbox_ops")
+        assert result.error is None
+        assert result.entries is not None
+        paths = sorted([i["path"] for i in result.entries])
         assert "/tmp/test_sandbox_ops/a.txt" in paths
         assert "/tmp/test_sandbox_ops/b.txt" in paths
 
-    def test_glob_info(self, sandbox_backend: SandboxBackendProtocol) -> None:
-        """Create files and verify `glob_info()` returns expected matches."""
+    def test_glob(self, sandbox_backend: SandboxBackendProtocol) -> None:
+        """Create files and verify `glob()` returns expected matches."""
         if not self.has_sync:
             pytest.skip("Sync tests not supported.")
         sandbox_backend.write("/tmp/test_sandbox_ops/x.py", "print('x')")
         sandbox_backend.write("/tmp/test_sandbox_ops/y.txt", "y")
-        matches = sandbox_backend.glob_info("*.py", path="/tmp/test_sandbox_ops")
-        assert [m["path"] for m in matches] == ["x.py"]
+        result = sandbox_backend.glob("*.py", path="/tmp/test_sandbox_ops")
+        assert result.error is None
+        assert result.matches is not None
+        assert [m["path"] for m in result.matches] == ["x.py"]
 
-    def test_grep_raw_literal(self, sandbox_backend: SandboxBackendProtocol) -> None:
-        """Verify `grep_raw()` performs literal matching on special characters."""
+    def test_grep_literal(self, sandbox_backend: SandboxBackendProtocol) -> None:
+        """Verify `grep()` performs literal matching on special characters."""
         if not self.has_sync:
             pytest.skip("Sync tests not supported.")
         sandbox_backend.write("/tmp/test_sandbox_ops/grep.txt", "a (b)\nstr | int\n")
-        matches = sandbox_backend.grep_raw("str | int", path="/tmp/test_sandbox_ops")
-        assert isinstance(matches, list)
-        assert matches[0]["path"].endswith("/grep.txt")
-        assert matches[0]["text"].strip() == "str | int"
+        result = sandbox_backend.grep("str | int", path="/tmp/test_sandbox_ops")
+        assert result.error is None
+        assert result.matches is not None
+        assert len(result.matches) > 0
+        assert result.matches[0]["path"].endswith("/grep.txt")
+        assert result.matches[0]["text"].strip() == "str | int"
 
     def test_upload_single_file(self, sandbox_backend: SandboxBackendProtocol) -> None:
         """Upload one file and verify its contents on the sandbox."""