diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5d172d4..d40aa58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
           ruby-version: ${{ matrix.ruby-version }}
 
       - name: Run tests
-        run: ruby -Ilib -Itest -e "Dir['test/test_*.rb'].each { |f| require f }"
+        run: ruby -Ilib -Itest -e "Dir['test/test_*.rb'].each { |f| require File.expand_path(f) }"
 
       - name: Verify gem builds
         run: gem build ipdata.gemspec
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7393555..7004923 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -75,7 +75,7 @@ jobs:
           ruby-version: "3.3"
 
       - name: Run tests
-        run: ruby -Ilib -Itest -e "Dir['test/test_*.rb'].each { |f| require f }"
+        run: ruby -Ilib -Itest -e "Dir['test/test_*.rb'].each { |f| require File.expand_path(f) }"
 
       - name: Build gem
         run: gem build ipdata.gemspec