diff --git a/tests/install/conftest.py b/tests/install/conftest.py
index aa8bc1b5..15a09d7c 100644
--- a/tests/install/conftest.py
+++ b/tests/install/conftest.py
@@ -125,6 +125,9 @@ def answerfile_maybe_tweak_parttable(request, answerfile):
     if firmware.endswith("+dell"):
         answerfile.top_append(dict(TAG="script", stage="installation-start",
                                    type="url", CONTENTS="file:///root/preinstall-utilitypart.sh"))
+    if firmware.endswith("+mbr"):
+        answerfile.top_append(dict(TAG="script", stage="installation-start",
+                                   type="url", CONTENTS="file:///root/preinstall-mbrparttable.sh"))
 
 # Remasters the ISO sepecified by `installer_iso` mark, with:
 # - network and ssh support activated, and .ssh/authorized_key so tests can
@@ -247,6 +250,18 @@ def remastered_iso(installer_iso, answerfile, install_disk):
 EOP
 EOF
 
+cat > "$INSTALLIMG/root/preinstall-mbrparttable.sh" <<'EOF'
+#!/bin/sh
+set -ex
+
+# Dell utility partition
+sgdisk --zap-all /dev/{install_disk}
+sfdisk /dev/{install_disk} << 'EOP'
+unit: sectors
+p1 : start=     2048, size=    32768, Id=83
+EOP
+EOF
+
 cat > "$INSTALLIMG/root/postinstall.sh" <<'EOF'
 #!/bin/sh
 set -ex
diff --git a/tests/install/test.py b/tests/install/test.py
index d3690599..7784302d 100644
--- a/tests/install/test.py
+++ b/tests/install/test.py
@@ -32,7 +32,7 @@ class TestNested:
         "xs8", "ch821.1",
         "xs70",
     ))
-    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell"))
+    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell", "bios+mbr"))
     @pytest.mark.vm_definitions(
         lambda firmware: dict(
             name="vm1",
@@ -53,6 +53,7 @@ class TestNested:
                 ),
                 "bios": (),
                 "bios+dell": (),
+                "bios+mbr": (),
             }[firmware],
             vdis=[dict(name="vm1 system disk", size="100GiB", device="xvda", userdevice="0")],
             cd_vbd=dict(device="xvdd", userdevice="3"),
@@ -109,7 +110,7 @@ def helper_vm_with_plugged_disk(running_vm, create_vms):
         "ch821.1", "xs8",
         "xs70",
     ))
-    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell"))
+    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell", "bios+mbr"))
     @pytest.mark.continuation_of(
         lambda version, firmware, local_sr, package_source: [dict(
             vm="vm1",
@@ -302,7 +303,7 @@ def _test_firstboot(self, create_vms, mode, *, machine='DEFAULT'):
         "ch821.1", "xs8",
         "xs70",
     ))
-    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell"))
+    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell", "bios+mbr"))
     @pytest.mark.continuation_of(
         lambda firmware, version, machine, local_sr, package_source: [
             dict(vm="vm1",
@@ -331,7 +332,7 @@ def test_boot_inst(self, create_vms,
         ("821.1", "821.1"),
         ("75", "821.1"),
     ])
-    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell"))
+    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell", "bios+mbr"))
     @pytest.mark.continuation_of(
         lambda firmware, orig_version, machine, package_source, local_sr: [dict(
             vm="vm1",
@@ -366,7 +367,7 @@ def test_upgrade(self, vm_booted_with_installer, install_disk,
         "821.1-821.1",
         "75-821.1",
     ))
-    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell"))
+    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell", "bios+mbr"))
     @pytest.mark.continuation_of(
         lambda firmware, mode, machine, package_source, local_sr: [dict(
             vm="vm1",
@@ -391,7 +392,7 @@ def test_boot_upg(self, create_vms,
         ("83rcnet-83rcnet", "83rcnet"), # FIXME
         ("821.1-821.1", "821.1"),
     ])
-    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell"))
+    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell", "bios+mbr"))
     @pytest.mark.continuation_of(
         lambda firmware, orig_version, local_sr, package_source: [dict(
             vm="vm1",
@@ -422,7 +423,7 @@ def test_restore(self, vm_booted_with_installer, install_disk,
         "83rcnet-83rcnet", "83rcnet-83rcnet-83rcnet", # FIXME
         "821.1-821.1-821.1",
     ))
-    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell"))
+    @pytest.mark.parametrize("firmware", ("uefi", "bios", "bios+dell", "bios+mbr"))
     @pytest.mark.continuation_of(
         lambda firmware, mode, package_source, local_sr: [dict(
             vm="vm1",