diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f29773c3d..fbc818f01 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -93,15 +93,14 @@ jobs:
         script/test package
 
   scan-build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v2
     - name: Bootstrap
       run: |
         sudo rm /etc/apt/sources.list.d/* && sudo apt-get update
-        sudo apt-get remove -y clang-6.0 libclang-common-6.0-dev libclang1-6.0 libllvm6.0
-        sudo apt-get autoremove
-        sudo apt-get --no-install-recommends install -y clang-tools
+        sudo apt-get remove libllvm10
+        sudo apt-get --no-install-recommends install -y clang-tools-10
     - name: Run
       run: |
         script/check-scan-build
diff --git a/script/check-scan-build b/script/check-scan-build
index 9d4292fce..fd327f78f 100755
--- a/script/check-scan-build
+++ b/script/check-scan-build
@@ -92,15 +92,16 @@ do_scan_build()
         "--enable-ncp"
         "--enable-radio-only"
         "--with-examples=simulation"
+        "--disable-tools"
     )
 
     export CPPFLAGS="${options[*]} -DOPENTHREAD_CONFIG_NCP_SPI_ENABLE=1"
-    scan-build ./configure "${configure_options[@]}"
-    scan-build --status-bugs -analyze-headers -v make -j"${OT_BUILD_JOBS}"
+    scan-build-10 ./configure "${configure_options[@]}"
+    scan-build-10 --status-bugs -analyze-headers -v make -j"${OT_BUILD_JOBS}"
 
     export CPPFLAGS="${options[*]} -DOPENTHREAD_CONFIG_NCP_UART_ENABLE=1"
-    scan-build ./configure "${configure_options[@]}"
-    scan-build --status-bugs -analyze-headers -v make -j"${OT_BUILD_JOBS}"
+    scan-build-10 ./configure "${configure_options[@]}"
+    scan-build-10 --status-bugs -analyze-headers -v make -j"${OT_BUILD_JOBS}"
 }
 
 main()