diff --git a/.ci/install.sh b/.ci/install.sh
deleted file mode 100755
index c18aa4b23..000000000
--- a/.ci/install.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env bash
-
-# Fail on unset variables and command errors
-set -ue -o pipefail
-
-# Prevent commands misbehaving due to locale differences
-export LC_ALL=C
-
-.ci/install/linux.sh $VIM_BIN $VIM_TAG
-if [ "$VIM_BIN" = "nvim" ]; then
-    export PATH="${DEPS}/_neovim/${VIM_TAG}/bin:${PATH}"
-    export VIM="${DEPS}/_neovim/${VIM_TAG}/share/nvim/runtime"
-else
-    export PATH="${DEPS}/_vim/${VIM_TAG}/bin:${PATH}"
-    export VIM="${DEPS}/_vim/${VIM_TAG}/share/vim"
-fi
-
-echo "\$VIM: \"${VIM}\""
-echo "=================  nvim version ======================"
-$VIM_BIN --version
diff --git a/.ci/install/linux.sh b/.ci/install/linux.sh
index 417e2be49..e55bdeb52 100755
--- a/.ci/install/linux.sh
+++ b/.ci/install/linux.sh
@@ -1,3 +1,11 @@
+#!/usr/bin/env bash
+
+# Fail on unset variables and command errors
+set -ue -o pipefail
+
+# Prevent commands misbehaving due to locale differences
+export LC_ALL=C
+
 install_vim() {
     local URL=https://github.com/vim/vim
     local tag=$1
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 4bfbe7a52..500bf9b38 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -9,19 +9,24 @@ jobs:
       matrix:
           include:
               - vimbin: vim
-                vimtag: ["v7.4.052", "v7.4.629", "v7.4.1689", "v8.0.0027", "v8.0.1453", "v8.1.2269"]
+                vimtag: v8.1.2269
+                # vimtag: ["v7.4.052", "v7.4.629", "v7.4.1689", "v8.0.0027", "v8.0.1453", "v8.1.2269"]
               - vimbin: nvim
-                vimtag: ["v0.4.3", "v0.4.3", "v0.4.3", "v0.4.2", "v0.3.8", "v0.3.7", "v0.3.5", "v0.3.4", "v0.3.3", "v0.3.2", "v0.3.1", "v0.3.0"]
-    runs-on: ubuntu-latest
+                vimtag: v0.4.4
+                # vimtag: ["v0.4.3", "v0.4.3", "v0.4.3", "v0.4.2", "v0.3.8", "v0.3.7", "v0.3.5", "v0.3.4", "v0.3.3", "v0.3.2", "v0.3.1", "v0.3.0"]
+    runs-on: ubuntu-16.04
+    env:
+        VIM_BIN: ${{ matrix.vimbin }}
+        VIM_TAG: ${{ matrix.vimtag }}
+        DEPS: /home/runner/work/SpaceVim/deps
     steps:
     - name: Checkout
       uses: actions/checkout@master
+    - name: Install dependencies
+      run: |
+          sudo apt-get update
+          sudo apt-get install -y autoconf automake build-essential cmake gcc-multilib gettext gperf libtool-bin locales ninja-build pkg-config unzip
     - name: Install ${{ matrix.vimbin }} ${{ matrix.vimtag }}
-      env:
-          VIM_BIN: matrix.vimbin
-          VIM_TAG: matrix.vimtag
-          DEPS: ~/deps
-          PATH: ~/deps/bin:~/vim/bin:$PATH
       run: |
         .ci/install/linux.sh $VIM_BIN $VIM_TAG
     - name: Review ${{ matrix.vimbin }} version
@@ -40,9 +45,8 @@ jobs:
         echo "\$VIM: \"${VIM}\""
         echo "=================  ${VIM_BIN} version ======================"
         $VIM_BIN --version
-        pip install covimerage
-        pip install codecov
-        python -c 'import os,sys,fcntl; flags = fcntl.fcntl(sys.stdout, fcntl.F_GETFL); fcntl.fcntl(sys.stdout, fcntl.F_SETFL, flags&~os.O_NONBLOCK);'
+        pip install --upgrade "pip < 21.0"
+        pip install covimerage virtualenv codecov
         make test_coverage
         covimerage -vv xml --omit 'build/*'
         codecov -X search gcov pycov -f coverage.xml
diff --git a/test/api/file.vader b/test/api/file.vader
index 3bb2185f2..faba4d24f 100644
--- a/test/api/file.vader
+++ b/test/api/file.vader
@@ -7,6 +7,8 @@ Execute ( SpaceVim api: file.fticon ):
 Execute ( SpaceVim api: file.unify_path ):
   let path = fnamemodify('.SpaceVim.d/init.vim', ':p')
   AssertEqual file.unify_path(path, ':p'), fnamemodify('.SpaceVim.d/init.vim', ':p:gs?[\\/]?/?')
+  let path = '~/.SpaceVim.d'
+  AssertEqual file.unify_path(path, ':p')[-1:], '/'
 
 Execute ( SpaceVim api: file.findfile ):
   let path = fnamemodify('.SpaceVim.d/init.vim', ':p')