diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fa51c05f4..89f378dc9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -60,6 +60,9 @@ jobs:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
       EXPERIMENTAL: ${{ matrix.experimental }}
       JRUBY_OPTS: --debug
+      # Ruby version > 2.3 needs host 127.0.0.1 for GitHub Action to find Postgres.
+      # Ruby version <= 2.3 will throw random error from C if host is provided.
+      PG_HOST: ${{ matrix.ruby > 2.3 && '127.0.0.1' || null }}  # workaround to ternary operator
     steps:
       - uses: actions/checkout@v3
       - name: Setup ImageMagick policy
diff --git a/spec/support/activerecord.rb b/spec/support/activerecord.rb
index 73a4d308e..ea5bf1b7c 100644
--- a/spec/support/activerecord.rb
+++ b/spec/support/activerecord.rb
@@ -9,7 +9,6 @@
 
 # Change this if PG is unavailable
 dbconfig = {
-  :host     => '127.0.0.1',
   :adapter  => 'postgresql',
   :database => 'carrierwave_test',
   :encoding => 'utf8',
@@ -17,6 +16,8 @@
   :password => 'postgres'
 }
 
+dbconfig[:host] = ENV['PG_HOST'] unless ENV['PG_HOST'].nil?
+
 database = dbconfig.delete(:database)
 
 ActiveRecord::Base.establish_connection(dbconfig.merge(database: "template1"))