diff --git a/default.nix b/default.nix
index a281680..6e75765 100644
--- a/default.nix
+++ b/default.nix
@@ -164,18 +164,9 @@ in rec {
     '';
   };
 
-  tests = pkgs.writeShellScript "isle-tests" ''
-    export PATH=${appImage}/bin:$PATH
-    test_dir=${./tests}
-
-    this_user="$(${pkgs.coreutils}/bin/whoami)"
-
-    echo "Requesting sudo in order to set thread capabilities, will drop back down to user '$this_user' immediately"
-    sudo ${pkgs.libcap}/bin/capsh \
-        --caps="cap_net_admin+eip cap_setpcap,cap_setuid,cap_setgid+ep" \
-        --keep=1 \
-        --user="$this_user" \
-        --addamb=cap_net_admin \
-        -- $test_dir/entrypoint.sh "$@"
+  tests = pkgs.writeScript "isle-tests" ''
+    export PATH=${pkgs.lib.makeBinPath [ appImage pkgs.busybox ]}
+    export SHELL=${pkgs.bash}/bin/bash
+    exec ${./tests}/entrypoint.sh "$@"
   '';
 }
diff --git a/nix/appimagetool.nix b/nix/appimagetool.nix
index 3086842..a6b2706 100644
--- a/nix/appimagetool.nix
+++ b/nix/appimagetool.nix
@@ -12,7 +12,8 @@ let
   # The author of go-appimage has set up some crazy continuous integration build
   # system with github, which is really cool, except that it doesn't preserve
   # any older builds of the project. And it's pretty difficult to build it
-  # ourselves. So fuck it, just embed a tarball into the repo.
+  # ourselves. So fuck it, just embed the build artifacts directly in this
+  # project.
   src = {
     "x86_64" = "${srcDir}/appimagetool-${version}-x86_64.AppImage";
     "aarch64" = "${srcDir}/go-appimage/appimagetool-${version}-aarch64.AppImage";
diff --git a/test.sh b/test.sh
deleted file mode 100755
index 68149b4..0000000
--- a/test.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/usr/bin/env sh
-
-$(nix-build --no-out-link -A tests)
diff --git a/tests.sh b/tests.sh
new file mode 100755
index 0000000..2cebb42
--- /dev/null
+++ b/tests.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -e
+
+entrypoint="$(nix-build --no-out-link -A tests)"
+this_user="$(whoami)"
+
+echo "Requesting sudo in order to set thread capabilities, will drop back down to user '$this_user' immediately"
+
+sudo -E capsh \
+    --caps="cap_net_admin+eip cap_setpcap,cap_setuid,cap_setgid+ep" \
+    --keep=1 \
+    --user="$this_user" \
+    --addamb=cap_net_admin \
+    -- "$entrypoint" "$@"
diff --git a/tests/00-version.sh b/tests/cases/00-version.sh
similarity index 100%
rename from tests/00-version.sh
rename to tests/cases/00-version.sh
diff --git a/tests/01-create-network.sh b/tests/cases/01-create-network.sh
similarity index 100%
rename from tests/01-create-network.sh
rename to tests/cases/01-create-network.sh
diff --git a/tests/entrypoint.sh b/tests/entrypoint.sh
old mode 100644
new mode 100755
index c5a007e..e4ea2e2
--- a/tests/entrypoint.sh
+++ b/tests/entrypoint.sh
@@ -1,5 +1,9 @@
 set -e
 
+# cd into script's directory
+cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null
+root=$(pwd)
+
 REGEXS=()
 
 while [[ $# -gt 0 ]]; do
@@ -29,10 +33,6 @@ EOF
   esac
 done
 
-# cd into script's directory
-cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null
-root=$(pwd)
-
 TMPDIR="$(mktemp --tmpdir -d isle-tests.XXXXXX)"
 if [ -z "$KEEP_TMP" ]; then trap 'rm -rf $TMPDIR' EXIT; fi
 
@@ -40,14 +40,14 @@ export TMPDIR
 echo "tmp dir is $TMPDIR"
 
 test_files=$(
-    find . -type f -name '*.sh' \
-    | sed "s|^\./||" \
+    find ./cases -type f -name '*.sh' \
+    | sed "s|^\./cases/||" \
     | grep -v entrypoint.sh \
-    | sort -n\
+    | sort -n
 )
 
 for r in "${REGEXS[@]}"; do
-    test_files="$(echo "$test_files" | grep -P "$r")"
+    test_files="$(echo "$test_files" | grep "$r")"
 done
 
 echo -e "number of tests: $(echo "$test_files" | wc -l)\n"
@@ -64,7 +64,7 @@ for file in $test_files; do
         mkdir -p "$TMPDIR" "$XDG_RUNTIME_DIR" "$XDG_DATA_HOME"
         cd "$TMPDIR"
 
-        if ! $SHELL -e -x "$root/$file" >"$output" 2>&1; then
+        if ! $SHELL -e -x "$root/cases/$file" >"$output" 2>&1; then
             echo "$file FAILED"
             if [ -z "$VERBOSE" ]; then
                 echo "output of test is as follows"
@@ -78,4 +78,3 @@ for file in $test_files; do
 done
 
 echo -e '\nall tests succeeded!'
-