diff --git a/.ci/get_shell_profile.sh b/.ci/get_shell_profile.sh
index 3da1bb2..7769b7f 100755
--- a/.ci/get_shell_profile.sh
+++ b/.ci/get_shell_profile.sh
@@ -1,16 +1,14 @@
 #!/bin/bash
 
-OS="$(uname -s)"
-
 case $1 in
   "fish")
-    CONFIG_DIR="$(fish -c 'echo -n $__fish_config_dir')"
-    echo "${CONFIG_DIR-"$HOME/.config/fish"}/fish.config"
+    echo "$HOME/.config/fish/config.fish"
     ;;
   "zsh")
     echo "$HOME/.zshrc"
     ;;
   "bash")
+    OS="$(uname -s)"
     if [ "$OS" = "Darwin" ]; then
       echo "$HOME/.profile"
     else
diff --git a/.ci/install.sh b/.ci/install.sh
index 26b9c69..801f8c0 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -4,6 +4,7 @@ set -e
 
 INSTALL_DIR="$HOME/.fnm"
 RELEASE="latest"
+OS="$(uname -s)"
 
 # Parse Flags
 parse_args() {
@@ -39,10 +40,6 @@ parse_args() {
 }
 
 set_filename() {
-  local OS
-
-  OS=$(uname -s)
-
   if [ "$OS" == "Linux" ]; then
     FILENAME="fnm-linux"
   elif [ "$OS" == "Darwin" ] && [ "$FORCE_INSTALL" == "true" ]; then
@@ -77,7 +74,7 @@ download_fnm() {
 
     mkdir -p "$INSTALL_DIR" &>/dev/null
 
-    if ! curl --progress-bar -L "$URL" -o "$DOWNLOAD_DIR/$FILENAME.zip"; then
+    if ! curl --progress-bar --fail -L "$URL" -o "$DOWNLOAD_DIR/$FILENAME.zip"; then
       echo "Download failed.  Check that the release/filename are correct."
       exit 1
     fi
diff --git a/.ci/test_installation_script.sh b/.ci/test_installation_script.sh
index 7311441..cee4b32 100755
--- a/.ci/test_installation_script.sh
+++ b/.ci/test_installation_script.sh
@@ -1,21 +1,37 @@
 #!/bin/bash
 
+set -e
+
 DIRECTORY="$(dirname "$0")"
 SHELL_TO_RUN="$1"
 PROFILE_FILE="$("$DIRECTORY/get_shell_profile.sh" "$SHELL_TO_RUN")"
 
+ls -lah ~
+echo "---"
 echo "Profile is $PROFILE_FILE"
+echo "---"
+cat "$PROFILE_FILE"
+echo "---"
+echo "PATH=$PATH"
+echo "---"
+
+$SHELL_TO_RUN -c "
+  . $PROFILE_FILE
+  fnm --version
+"
 
-$SHELL_TO_RUN -c '
+$SHELL_TO_RUN -c "
+  . $PROFILE_FILE
   fnm install 12.5.0
   fnm ls | grep 12.5.0
 
-  echo "fnm ls worked."
-'
+  echo 'fnm ls worked.'
+"
 
-$SHELL_TO_RUN -c '
+$SHELL_TO_RUN -c "
+  . $PROFILE_FILE
   fnm use 12.5.0
   node --version | grep 12.5.0
 
-  echo "node --version worked."
-'
+  echo 'node --version worked.'
+"
diff --git a/.github/workflows/installation_script.yml b/.github/workflows/installation_script.yml
index 210d2ad..a2517d5 100644
--- a/.github/workflows/installation_script.yml
+++ b/.github/workflows/installation_script.yml
@@ -31,8 +31,18 @@ jobs:
       - run: "brew install ${{ matrix.shell }}"
         name: Install ${{matrix.shell}} using Homebrew
         if: matrix.setup.os == 'macos'
-      - run: "cp ~/.bashrc ~/.bashrc.bak && echo '. ~/.bashrc.bak' > ~/.bashrc"
-        name: reset bashrc file
+      - run: |
+          if [ -f ~/.bashrc ]; then
+            cp ~/.bashrc ~/.bashrc.bak
+            echo 'echo hello world' > ~/.bashrc
+            echo '. ~/.bashrc.bak' >> ~/.bashrc
+          fi
+
+          if [ -f ~/.zshrc ]; then
+            echo 'echo hello world' > ~/.zshrc
+            echo '. ~/.zshrc.bak' >> ~/.zshrc
+          fi
+        name: reset shell profiles
       - run: "env SHELL=$(which ${{ matrix.shell }}) bash ./.ci/install.sh ${{ matrix.setup.script_arguments }}"
         name: Run the installation script
       - run: ./.ci/test_installation_script.sh ${{ matrix.shell }}