diff --git a/t/t5301-sliding-window.sh b/t/t5301-sliding-window.sh
index 2fc5af6007..cae8c2e882 100755
--- a/t/t5301-sliding-window.sh
+++ b/t/t5301-sliding-window.sh
@@ -16,12 +16,12 @@ test_expect_success \
          git update-index --add $i || return 1
      done &&
      echo d >d && cat c >>d && git update-index --add d &&
-     tree=`git write-tree` &&
-     commit1=`git commit-tree $tree </dev/null` &&
+     tree=$(git write-tree) &&
+     commit1=$(git commit-tree $tree </dev/null) &&
      git update-ref HEAD $commit1 &&
      git repack -a -d &&
-     test "`git count-objects`" = "0 objects, 0 kilobytes" &&
-     pack1=`ls .git/objects/pack/*.pack` &&
+     test "$(git count-objects)" = "0 objects, 0 kilobytes" &&
+     pack1=$(ls .git/objects/pack/*.pack) &&
      test -f "$pack1"'
 
 test_expect_success \
@@ -43,11 +43,11 @@ test_expect_success \
     'repack -a -d, packedGit{WindowSize,Limit} == 1 page' \
     'git config core.packedGitWindowSize 512 &&
      git config core.packedGitLimit 512 &&
-     commit2=`git commit-tree $tree -p $commit1 </dev/null` &&
+     commit2=$(git commit-tree $tree -p $commit1 </dev/null) &&
      git update-ref HEAD $commit2 &&
      git repack -a -d &&
-     test "`git count-objects`" = "0 objects, 0 kilobytes" &&
-     pack2=`ls .git/objects/pack/*.pack` &&
+     test "$(git count-objects)" = "0 objects, 0 kilobytes" &&
+     pack2=$(ls .git/objects/pack/*.pack) &&
      test -f "$pack2" &&
      test "$pack1" \!= "$pack2"'