diff --git a/cloud-hypervisor/tests/integration.rs b/cloud-hypervisor/tests/integration.rs
index 2037ad008..99a22f273 100644
--- a/cloud-hypervisor/tests/integration.rs
+++ b/cloud-hypervisor/tests/integration.rs
@@ -11537,7 +11537,7 @@ mod windows {
             .args(["--kernel", edk2_path().to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             .default_net()
             .capture_output()
             .spawn()
@@ -11586,7 +11586,7 @@ mod windows {
             .args([
                 "--disk",
                 format!(
-                    "path={},num_queues=4",
+                    "path={},num_queues=4,sparse=off",
                     windows_guest
                         .guest()
                         .disk_config
@@ -11654,7 +11654,7 @@ mod windows {
             .args(["--kernel", ovmf_path.to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             .default_net()
             .capture_output()
             .spawn()
@@ -11743,7 +11743,7 @@ mod windows {
             .args(["--kernel", ovmf_path.to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             .default_net()
             .capture_output()
             .spawn()
@@ -11818,7 +11818,7 @@ mod windows {
             .args(["--kernel", ovmf_path.to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             .default_net()
             .capture_output()
             .spawn()
@@ -11892,7 +11892,7 @@ mod windows {
             .args(["--kernel", ovmf_path.to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             .default_net()
             .capture_output()
             .spawn()
@@ -11966,7 +11966,7 @@ mod windows {
             .args(["--kernel", ovmf_path.to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             .default_net()
             .capture_output()
             .spawn()
@@ -12062,7 +12062,7 @@ mod windows {
             .args(["--kernel", ovmf_path.to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             .default_net()
             .capture_output()
             .spawn()
@@ -12194,7 +12194,7 @@ mod windows {
             .args(["--kernel", ovmf_path.to_str().unwrap()])
             .args(["--serial", "tty"])
             .args(["--console", "off"])
-            .default_disks()
+            .default_disks_sparse_off()
             // The multi net dev config is borrowed from test_multiple_network_interfaces
             .args([
                 "--net",
diff --git a/test_infra/src/lib.rs b/test_infra/src/lib.rs
index 3ab550870..2848a130e 100644
--- a/test_infra/src/lib.rs
+++ b/test_infra/src/lib.rs
@@ -1448,35 +1448,31 @@ impl<'a> GuestCommand<'a> {
     }
 
     pub fn default_disks(&mut self) -> &mut Self {
-        if self.guest.disk_config.disk(DiskType::CloudInit).is_some() {
+        self.default_disks_inner(true)
+    }
+
+    pub fn default_disks_sparse_off(&mut self) -> &mut Self {
+        self.default_disks_inner(false)
+    }
+
+    fn default_disks_inner(&mut self, sparse: bool) -> &mut Self {
+        let sparse_opt = if sparse { "" } else { ",sparse=off" };
+        let os_disk = format!(
+            "path={}{}",
+            self.guest
+                .disk_config
+                .disk(DiskType::OperatingSystem)
+                .unwrap(),
+            sparse_opt
+        );
+        if let Some(cloud_init) = self.guest.disk_config.disk(DiskType::CloudInit) {
             self.args([
                 "--disk",
-                format!(
-                    "path={}",
-                    self.guest
-                        .disk_config
-                        .disk(DiskType::OperatingSystem)
-                        .unwrap()
-                )
-                .as_str(),
-                format!(
-                    "path={}",
-                    self.guest.disk_config.disk(DiskType::CloudInit).unwrap()
-                )
-                .as_str(),
+                os_disk.as_str(),
+                format!("path={cloud_init}").as_str(),
             ])
         } else {
-            self.args([
-                "--disk",
-                format!(
-                    "path={}",
-                    self.guest
-                        .disk_config
-                        .disk(DiskType::OperatingSystem)
-                        .unwrap()
-                )
-                .as_str(),
-            ])
+            self.args(["--disk", os_disk.as_str()])
         }
     }