diff --git a/test/fuse_integration/posix_compliance_test.go b/test/fuse_integration/posix_compliance_test.go
index bb3f2a0a1..fbd2eef0b 100644
--- a/test/fuse_integration/posix_compliance_test.go
+++ b/test/fuse_integration/posix_compliance_test.go
@@ -257,16 +257,16 @@ func (s *POSIXComplianceTestSuite) TestPermissions(t *testing.T) {
 		stat, err := os.Stat(testFile)
 		require.NoError(t, err)
 
-		// Note: Some FUSE implementations may not preserve execute bits on regular files
-		// SeaweedFS FUSE mount typically masks execute bits for security
+		// Note: The final file permissions are affected by the system's umask.
+		// We check against the requested mode and the mode as affected by a common umask (e.g. 0022).
 		actualMode := stat.Mode() & os.ModePerm
 		expectedMode := os.FileMode(0642)
-		expectedModeNoExec := os.FileMode(0640) // 642 without execute bits
+		expectedModeWithUmask := os.FileMode(0640) // e.g., 0642 with umask 0002 or 0022
 
-		// Accept either the exact permissions or permissions without execute bit
-		if actualMode != expectedMode && actualMode != expectedModeNoExec {
+		// Accept either the exact permissions or permissions as modified by umask
+		if actualMode != expectedMode && actualMode != expectedModeWithUmask {
 			t.Errorf("Expected file permissions %o or %o, but got %o",
-				expectedMode, expectedModeNoExec, actualMode)
+				expectedMode, expectedModeWithUmask, actualMode)
 		}
 	})
 
diff --git a/test/fuse_integration/posix_extended_test.go b/test/fuse_integration/posix_extended_test.go
index 76f3f115d..408d93287 100644
--- a/test/fuse_integration/posix_extended_test.go
+++ b/test/fuse_integration/posix_extended_test.go
@@ -115,10 +115,11 @@ func (s *POSIXExtendedTestSuite) TestExtendedAttributes(t *testing.T) {
 		require.NoError(t, err)
 		require.Greater(t, size, 0)
 
-		// Parse the null-separated list
-		attrList := string(listBuf[:size])
-		for name := range attrs {
-			require.Contains(t, attrList, name)
+		// Parse the null-separated list and verify attributes
+		attrList := parseXattrList(listBuf[:size])
+		expectedAttrs := []string{"user.attr1", "user.attr2", "user.attr3"}
+		for _, expectedAttr := range expectedAttrs {
+			require.Contains(t, attrList, expectedAttr, "Expected attribute should be in the list")
 		}
 	})
 
diff --git a/test/fuse_integration/posix_external_test.go b/test/fuse_integration/posix_external_test.go
index e1ca0b5e7..31d1d1ad6 100644
--- a/test/fuse_integration/posix_external_test.go
+++ b/test/fuse_integration/posix_external_test.go
@@ -6,6 +6,7 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strings"
+	"syscall"
 	"testing"
 	"time"
 
@@ -476,8 +477,11 @@ func (s *ExternalPOSIXTestSuite) testEdgeCases(t *testing.T, mountPoint string)
 		// Note: filepath.Join(testDir, "") returns testDir itself
 		err := os.WriteFile(testDir, []byte("test"), 0644)
 		require.Error(t, err)
-		// Verify the error indicates we're trying to write to a directory
-		require.Contains(t, err.Error(), "directory", "Expected error to indicate target is a directory")
+		// Verify the error is specifically about the target being a directory
+		var pathErr *os.PathError
+		if require.ErrorAs(t, err, &pathErr) {
+			require.Equal(t, syscall.EISDIR, pathErr.Err)
+		}
 	})
 
 	t.Run("VeryLongFileName", func(t *testing.T) {