diff --git a/.github/workflows/posix-compliance.yml b/.github/workflows/posix-compliance.yml
index 28edcabbb..2235f8703 100644
--- a/.github/workflows/posix-compliance.yml
+++ b/.github/workflows/posix-compliance.yml
@@ -252,6 +252,26 @@ jobs:
         # Verify mount point
         echo "Mount point: $SEAWEEDFS_MOUNT_POINT"
         ls -la $SEAWEEDFS_MOUNT_POINT
+        
+        # Verify mount is actually working by testing file operations
+        echo "Verifying SeaweedFS mount functionality..."
+        TEST_FILE="$SEAWEEDFS_MOUNT_POINT/.mount_verification_test"
+        echo "SeaweedFS mount test" > "$TEST_FILE"
+        if [ "$(cat "$TEST_FILE")" = "SeaweedFS mount test" ]; then
+          echo "✅ Mount verification successful"
+          rm -f "$TEST_FILE"
+        else
+          echo "❌ Mount verification failed - mount may not be working properly"
+          exit 1
+        fi
+        
+        # Check if this is actually a FUSE mount
+        if mount | grep -q "$SEAWEEDFS_MOUNT_POINT"; then
+          echo "✅ FUSE mount detected:"
+          mount | grep "$SEAWEEDFS_MOUNT_POINT"
+        else
+          echo "⚠️  Warning: Mount point not found in mount table"
+        fi
     
     - name: Run POSIX compliance tests
       id: posix-tests
@@ -273,6 +293,12 @@ jobs:
         export TEST_MOUNT_POINT="$SEAWEEDFS_MOUNT_POINT"
         export TEST_SKIP_CLUSTER_SETUP="true"
         
+        # Debug: Show environment variables
+        echo "🔍 Test Environment:"
+        echo "  TEST_MOUNT_POINT=$TEST_MOUNT_POINT"
+        echo "  TEST_SKIP_CLUSTER_SETUP=$TEST_SKIP_CLUSTER_SETUP"
+        echo "  SEAWEEDFS_MOUNT_POINT=$SEAWEEDFS_MOUNT_POINT"
+        
         case "$TEST_TYPE" in
           "critical")
             make -f posix_Makefile test-posix-critical
diff --git a/test/fuse_integration/fallocate_darwin.go b/test/fuse_integration/fallocate_darwin.go
index 94f5de7b9..fa67f3f7a 100644
--- a/test/fuse_integration/fallocate_darwin.go
+++ b/test/fuse_integration/fallocate_darwin.go
@@ -34,6 +34,12 @@ type fstore struct {
 }
 
 func fallocateFile(fd int, mode int, offset int64, length int64) error {
+	// Check for unsupported modes on macOS
+	unsupportedModes := FALLOC_FL_PUNCH_HOLE | FALLOC_FL_NO_HIDE_STALE | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE
+	if mode&unsupportedModes != 0 {
+		return syscall.ENOTSUP // Operation not supported
+	}
+
 	// On macOS, we use fcntl with F_PREALLOCATE
 	store := fstore{
 		flags:   F_ALLOCATECONTIG,
diff --git a/test/fuse_integration/framework.go b/test/fuse_integration/framework.go
index 32bcb97a9..c0ac39b77 100644
--- a/test/fuse_integration/framework.go
+++ b/test/fuse_integration/framework.go
@@ -106,6 +106,27 @@ func (f *FuseTestFramework) Setup(config *TestConfig) error {
 				f.t.Logf("Warning: failed to cleanup test file: %v", err)
 			}
 
+			// Verify this is actually a SeaweedFS mount by checking for SeaweedFS-specific behavior
+			// Create a test file and verify it appears in the filer
+			verifyFile := filepath.Join(f.mountPoint, ".seaweedfs_mount_verification")
+			if err := os.WriteFile(verifyFile, []byte("SeaweedFS mount verification"), 0644); err != nil {
+				return fmt.Errorf("mount point verification failed - cannot write: %v", err)
+			}
+
+			// Read it back to ensure it's working
+			if data, err := os.ReadFile(verifyFile); err != nil {
+				return fmt.Errorf("mount point verification failed - cannot read: %v", err)
+			} else if string(data) != "SeaweedFS mount verification" {
+				return fmt.Errorf("mount point verification failed - data mismatch")
+			}
+
+			// Clean up verification file
+			if err := os.Remove(verifyFile); err != nil {
+				f.t.Logf("Warning: failed to cleanup verification file: %v", err)
+			}
+
+			f.t.Logf("✅ SeaweedFS mount point verified and working: %s", f.mountPoint)
+
 			f.isSetup = true
 			return nil
 		}
diff --git a/test/fuse_integration/posix_Makefile b/test/fuse_integration/posix_Makefile
index a369cb5ef..7b74c984e 100644
--- a/test/fuse_integration/posix_Makefile
+++ b/test/fuse_integration/posix_Makefile
@@ -320,7 +320,7 @@ generate-json-report:
 	@echo "{" > $(REPORT_DIR)/posix_compliance_report.json
 	@echo "  \"report_type\": \"posix_compliance\"," >> $(REPORT_DIR)/posix_compliance_report.json
 	@echo "  \"timestamp\": \"$$(date -u +"%Y-%m-%dT%H:%M:%SZ")\"," >> $(REPORT_DIR)/posix_compliance_report.json
-	@echo "  \"seaweedfs_version\": \"$$($(WEED_BINARY) version 2>/dev/null | head -n1 || echo 'Unknown')\"," >> $(REPORT_DIR)/posix_compliance_report.json
+	@echo "  \"seaweedfs_version\": \"$$($(WEED_BINARY) version 2>/dev/null | head -n1 | sed 's/\\/\\\\/g; s/\"/\\\"/g' || echo 'Unknown')\"," >> $(REPORT_DIR)/posix_compliance_report.json
 	@echo "  \"test_environment\": { \"os\": \"$$(uname -s)\", \"arch\": \"$$(uname -m)\" }," >> $(REPORT_DIR)/posix_compliance_report.json
 	@echo "  \"test_suites\": {" >> $(REPORT_DIR)/posix_compliance_report.json
 	@FIRST=true; \
diff --git a/test/fuse_integration/posix_extended_test.go b/test/fuse_integration/posix_extended_test.go
index 408d93287..bc966c15b 100644
--- a/test/fuse_integration/posix_extended_test.go
+++ b/test/fuse_integration/posix_extended_test.go
@@ -197,7 +197,7 @@ func (s *POSIXExtendedTestSuite) TestFileLocking(t *testing.T) {
 		}
 
 		err = syscall.FcntlFlock(file2.Fd(), syscall.F_SETLK, &flock2)
-		require.Equal(t, syscall.EAGAIN, err) // Lock should be blocked
+		require.Equal(t, syscall.EAGAIN, err) // Lock attempt should fail immediately as it's non-blocking
 
 		// Release lock
 		flock.Type = syscall.F_UNLCK