diff --git a/.travis.build.sh b/.travis.build.sh
index 4538bab1e2..7681d5a2da 100755
--- a/.travis.build.sh
+++ b/.travis.build.sh
@@ -112,6 +112,9 @@ elif [ "$TEST_SUITE" = "style" ]; then
         fi
     done
 elif [ "$TEST_SUITE" = "unit" ]; then
+    echo "Copying test artifacts from cached mirror..."
+    git clone "$TEST_ARTIFACTS_MIRROR" "open_xdmod/modules/xdmod/tests/xdmod-test-artifacts"
+
     open_xdmod/modules/xdmod/tests/runtests.sh
     if [ $? != 0 ]; then
         build_exit_value=2
diff --git a/.travis.install.sh b/.travis.install.sh
index a0b203135a..ce78be583e 100755
--- a/.travis.install.sh
+++ b/.travis.install.sh
@@ -37,3 +37,16 @@ source ~/.nvm/nvm.sh
 nvm install "$NODE_VERSION"
 nvm use "$NODE_VERSION"
 npm install
+
+# Create or update a mirror of the XDMoD test artifacts.
+#
+# Travis will create any directories that are set up for caching if they do
+# not exist, so check if the directory has contents instead of checking for
+# the existence of the directory.
+if [ -n "$(ls -A "$TEST_ARTIFACTS_MIRROR")" ]; then
+    echo "Updating XDMoD test artifacts mirror..."
+    git -C "$TEST_ARTIFACTS_MIRROR" remote update
+else
+    echo "Creating mirror of XDMoD test artifacts..."
+    git clone --mirror "$TEST_ARTIFACTS_SOURCE" "$TEST_ARTIFACTS_MIRROR"
+fi
diff --git a/.travis.yml b/.travis.yml
index a0582e8b82..ed9caa666e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,8 @@ php:
 env:
     global:
         - NODE_VERSION=6
+        - TEST_ARTIFACTS_SOURCE="https://github.com/ubccr/xdmod-test-artifacts.git"
+        - TEST_ARTIFACTS_MIRROR="$HOME/xdmod-test-artifacts.git"
     matrix:
         - TEST_SUITE=syntax
         - TEST_SUITE=style
@@ -21,6 +23,7 @@ cache:
         - $HOME/.npm
         - $HOME/.composer/cache
         - /tmp/pear/cache
+        - $TEST_ARTIFACTS_MIRROR
 
 # Delegate the installation step to the custom Travis installation script
 install: ./.travis.install.sh
diff --git a/composer.json b/composer.json
index 1bdae1a765..43478ad5c1 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,6 @@
     },
     "require-dev": {
         "phpunit/phpunit": "4.8.*",
-        "ubccr/xdmod-test-artifacts": "@dev",
         "squizlabs/php_codesniffer": "2.8.0"
     },
     "repositories": [
@@ -369,10 +368,6 @@
                     "installer-name": "commons-logging"
                 }
             }
-        },
-        {
-            "type": "vcs",
-            "url": "https://github.com/ubccr/xdmod-test-artifacts.git"
         }
     ],
     "extra": {
diff --git a/composer.lock b/composer.lock
index 1e121c1165..820ebbd378 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "ceeef77ecbe7a0be2763939f54b3ba06",
+    "content-hash": "a7f0b83227be083cad9eb402161beab4",
     "packages": [
         {
             "name": "apache/commons-beanutils",
@@ -2688,35 +2688,12 @@
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
             "time": "2015-07-26T08:59:42+00:00"
-        },
-        {
-            "name": "ubccr/xdmod-test-artifacts",
-            "version": "dev-master",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/ubccr/xdmod-test-artifacts.git",
-                "reference": "5cd5bde2b2041e9d71532c3e5e9a8fbddeada679"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/ubccr/xdmod-test-artifacts/zipball/5cd5bde2b2041e9d71532c3e5e9a8fbddeada679",
-                "reference": "5cd5bde2b2041e9d71532c3e5e9a8fbddeada679",
-                "shasum": ""
-            },
-            "type": "library",
-            "description": "Test artifacts for XDMoD and XDMoD submodules",
-            "support": {
-                "source": "https://github.com/ubccr/xdmod-test-artifacts/tree/master",
-                "issues": "https://github.com/ubccr/xdmod-test-artifacts/issues"
-            },
-            "time": "2017-04-21T18:47:07+00:00"
         }
     ],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": {
-        "openid/php-openid": 20,
-        "ubccr/xdmod-test-artifacts": 20
+        "openid/php-openid": 20
     },
     "prefer-stable": false,
     "prefer-lowest": false,
diff --git a/open_xdmod/modules/xdmod/tests/.gitignore b/open_xdmod/modules/xdmod/tests/.gitignore
new file mode 100644
index 0000000000..82b5225b47
--- /dev/null
+++ b/open_xdmod/modules/xdmod/tests/.gitignore
@@ -0,0 +1 @@
+/xdmod-test-artifacts
diff --git a/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/ConfigurationTest.php b/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/ConfigurationTest.php
index 02f73246e9..966cb0b6b3 100644
--- a/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/ConfigurationTest.php
+++ b/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/ConfigurationTest.php
@@ -13,8 +13,8 @@
 
 class ConfigurationTest extends \PHPUnit_Framework_TestCase
 {
-    const TEST_ARTIFACT_INPUT_PATH = "../../../../vendor/ubccr/xdmod-test-artifacts/xdmod/etlv2/configuration/input";
-    const TEST_ARTIFACT_OUTPUT_PATH = "../../../../vendor/ubccr/xdmod-test-artifacts/xdmod/etlv2/configuration/output";
+    const TEST_ARTIFACT_INPUT_PATH = "./xdmod-test-artifacts/xdmod/etlv2/configuration/input";
+    const TEST_ARTIFACT_OUTPUT_PATH = "./xdmod-test-artifacts/xdmod/etlv2/configuration/output";
 
     /**
      * Test JSON parse errors
diff --git a/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/EtlConfigurationTest.php b/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/EtlConfigurationTest.php
index 02bea1c856..5c7827d7fa 100644
--- a/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/EtlConfigurationTest.php
+++ b/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/EtlConfigurationTest.php
@@ -13,8 +13,8 @@
 
 class EtlConfigurationTest extends \PHPUnit_Framework_TestCase
 {
-    const TEST_ARTIFACT_INPUT_PATH = "../../../../vendor/ubccr/xdmod-test-artifacts/xdmod/etlv2/configuration/input";
-    const TEST_ARTIFACT_OUTPUT_PATH = "../../../../vendor/ubccr/xdmod-test-artifacts/xdmod/etlv2/configuration/output";
+    const TEST_ARTIFACT_INPUT_PATH = "./xdmod-test-artifacts/xdmod/etlv2/configuration/input";
+    const TEST_ARTIFACT_OUTPUT_PATH = "./xdmod-test-artifacts/xdmod/etlv2/configuration/output";
     const TMPDIR = '/tmp/xdmod-etl-configuration-test';
 
     /**
diff --git a/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/Rfc6901Test.php b/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/Rfc6901Test.php
index f9145bf534..aa5f311d73 100644
--- a/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/Rfc6901Test.php
+++ b/open_xdmod/modules/xdmod/tests/lib/ETL/Configuration/Rfc6901Test.php
@@ -14,8 +14,8 @@
 
 class Rfc6901Test extends \PHPUnit_Framework_TestCase
 {
-    const TEST_ARTIFACT_INPUT_PATH = "../../../../vendor/ubccr/xdmod-test-artifacts/xdmod/etlv2/configuration/input";
-    const TEST_ARTIFACT_OUTPUT_PATH = "../../../../vendor/ubccr/xdmod-test-artifacts/xdmod/etlv2/configuration/output";
+    const TEST_ARTIFACT_INPUT_PATH = "./xdmod-test-artifacts/xdmod/etlv2/configuration/input";
+    const TEST_ARTIFACT_OUTPUT_PATH = "./xdmod-test-artifacts/xdmod/etlv2/configuration/output";
 
     private $config = null;
     private $transformer = null;
diff --git a/open_xdmod/modules/xdmod/tests/runtests.sh b/open_xdmod/modules/xdmod/tests/runtests.sh
index c45030ddd8..e083092e20 100755
--- a/open_xdmod/modules/xdmod/tests/runtests.sh
+++ b/open_xdmod/modules/xdmod/tests/runtests.sh
@@ -14,5 +14,12 @@ if [ ! -x "$phpunit" ]; then
     exit 127
 fi
 
+artifacts_dir="./xdmod-test-artifacts"
+if [ -d "$artifacts_dir" ]; then
+    git -C "$artifacts_dir" pull
+else
+    git clone "https://github.com/ubccr/xdmod-test-artifacts.git" "$artifacts_dir"
+fi
+
 $phpunit ${PHPUNITARGS} .
 exit $?