diff --git a/src/utilities/git.jl b/src/utilities/git.jl
index 34534053..085cd5c7 100644
--- a/src/utilities/git.jl
+++ b/src/utilities/git.jl
@@ -32,10 +32,10 @@ function git_push(
 )
     force_flag = force ? ["-f"] : []
     name, email = get_git_name_and_email(; env=env)
-    git_ssh_command = _git_ssh_command(; pkey_filename)
+    git_ssh_command = _get_git_ssh_command(; pkey_filename)
     env2 = copy(ENV);
     env2["GIT_SSH_COMMAND"] = git_ssh_command
-    if pkey_filename === nothing
+    if isnothing(pkey_filename)
         true_remote = remote
     else
         # We need to convert the remote URL to SSH format.
@@ -49,7 +49,7 @@ function git_push(
     return nothing
 end
 
-function _git_ssh_command(; pkey_filename::Union{AbstractString,Nothing})
+function _get_git_ssh_command(; pkey_filename::Union{AbstractString,Nothing})
     enable_ssh_verbose_str = get(ENV, "JULIA_COMPATHELPER_ENABLE_SSH_VERBOSE", "false")
     enable_ssh_verbose_b = parse(Bool, enable_ssh_verbose_str)::Bool
     ssh = enable_ssh_verbose_b ? "ssh -vvvv" : "ssh"
@@ -91,9 +91,11 @@ function git_clone(
     local_path::AbstractString,
     pkey_filename::Union{AbstractString,Nothing}=nothing,
 )
-    env2 = copy(ENV);
-    env2["GIT_SSH_COMMAND"] = _git_ssh_command(; pkey_filename)
-    @mock run(`git clone $url $local_path`)
+    withenv(
+        "GIT_SSH_COMMAND" => isnothing(pkey_filename) ? "ssh" : "ssh -i $pkey_filename"
+    ) do
+        @mock run(`git clone $url $local_path`)
+    end
 
     return nothing
 end