diff --git a/openapi/tests/file/file_test.go b/openapi/tests/file/file_test.go
index a543b374..4774c5cb 100644
--- a/openapi/tests/file/file_test.go
+++ b/openapi/tests/file/file_test.go
@@ -164,7 +164,9 @@ func TestFileUpload(t *testing.T) {
 		assert.Contains(t, response, "path")
 		assert.Contains(t, response, "user_path")
 		assert.Equal(t, testFileName, response["filename"])
-		assert.Equal(t, testContentType, response["content_type"])
+		// Content type may include charset
+		contentType, _ := response["content_type"].(string)
+		assert.True(t, strings.HasPrefix(contentType, testContentType), "Content-Type should start with %s, got %s", testContentType, contentType)
 		assert.Equal(t, "uploaded", response["status"])
 
 		// The file_id should be URL-safe (no slashes) and be an MD5 hash (32 chars)
@@ -519,7 +521,9 @@ func TestFileRetrieve(t *testing.T) {
 		assert.Contains(t, response, "content_type")
 		assert.Equal(t, testFileID, response["file_id"])
 		assert.Equal(t, testFileName, response["filename"])
-		assert.Equal(t, testContentType, response["content_type"])
+		// Content type may include charset
+		contentType, _ := response["content_type"].(string)
+		assert.True(t, strings.HasPrefix(contentType, testContentType), "Content-Type should start with %s, got %s", testContentType, contentType)
 
 		t.Logf("Successfully retrieved file metadata: %s", testFileID)
 	})
@@ -627,7 +631,9 @@ func TestFileContent(t *testing.T) {
 		defer resp.Body.Close()
 
 		assert.Equal(t, http.StatusOK, resp.StatusCode)
-		assert.Equal(t, testContentType, resp.Header.Get("Content-Type"))
+		// Content type may include charset
+		assert.True(t, strings.HasPrefix(resp.Header.Get("Content-Type"), testContentType),
+			"Content-Type should start with %s, got %s", testContentType, resp.Header.Get("Content-Type"))
 
 		// Read and verify content
 		content, err := io.ReadAll(resp.Body)