diff --git a/drivers/gpu/drm/ci/test.yml b/drivers/gpu/drm/ci/test.yml
index 159eb7ba35886cded0950fe91a07d27cf2e4ce41..782c0d5270fdf6877dbd9b26d058fd79ef469cd5 100644
--- a/drivers/gpu/drm/ci/test.yml
+++ b/drivers/gpu/drm/ci/test.yml
@@ -154,7 +154,7 @@ msm:sdm845:
   extends:
     - .lava-igt:arm64
     - .rockchip
-  parallel: 2
+  parallel: 1
   variables:
     DEVICE_TYPE: rk3399-gru-kevin
     KERNEL_IMAGE_TYPE: ""
@@ -297,7 +297,7 @@ amdgpu:stoney:
 .mt8173:
   extends:
     - .mediatek
-  parallel: 4
+  parallel: 1
   variables:
     DEVICE_TYPE: mt8173-elm-hana
     RUNNER_TAG: mesa-ci-x86-64-lava-mt8173-elm-hana
@@ -305,7 +305,7 @@ amdgpu:stoney:
 .mt8183:
   extends:
     - .mediatek
-  parallel: 3
+  parallel: 1
   variables:
     DEVICE_TYPE: mt8183-kukui-jacuzzi-juniper-sku16
     RUNNER_TAG: mesa-ci-x86-64-lava-mt8183-kukui-jacuzzi-juniper-sku16
@@ -364,7 +364,7 @@ mediatek:mt8183-display:
 .g12b:
   extends:
     - .meson
-  parallel: 3
+  parallel: 1
   variables:
     DEVICE_TYPE: meson-g12b-a311d-khadas-vim3
     RUNNER_TAG: mesa-ci-x86-64-lava-meson-g12b-a311d-khadas-vim3