diff --git a/.circleci/test-deploy.yml b/.circleci/test-deploy.yml
index 576b2c3..7745c24 100644
--- a/.circleci/test-deploy.yml
+++ b/.circleci/test-deploy.yml
@@ -101,6 +101,23 @@ workflows:
           filters: *filters
           context: orb-testing-unity
           pre-steps: *mono
+      - unity/test:
+          name: "test-linux-with-custom-parameters"
+          step-name: "Check if test filter in custom parameter works"
+          unity-license-var-name: "UNITY_ENCODED_LICENSE_2021"
+          unity-username-var-name: "UNITY_USERNAME"
+          unity-password-var-name: "UNITY_PASSWORD"
+          executor:
+            name: "unity/ubuntu"
+            target_platform: "linux-il2cpp"
+            editor_version: "2021.3.1f1"
+            resource_class: "medium"
+          project-path: "Unity2D-Demo-Game-CI-CD/src"
+          custom-parameters: "-testFilter EnemyMovesLeft -customParam1 potato -customParam2 $CIRCLE_WORKFLOW_ID"
+          test-platform: "playmode"
+          filters: *filters
+          context: orb-testing-unity
+          pre-steps: *mono
       - unity/test:
           name: "test-windows"
           step-name: "Check if the tests run and results are uploaded"
@@ -117,6 +134,23 @@ workflows:
           filters: *filters
           context: orb-testing-unity
           pre-steps: *mono
+      - unity/test:
+          name: "test-windows-with-custom-parameters"
+          step-name: "Check if test filter in custom parameter works"
+          unity-license-var-name: "UNITY_ENCODED_LICENSE_2021"
+          unity-username-var-name: "UNITY_USERNAME"
+          unity-password-var-name: "UNITY_PASSWORD"
+          executor:
+            name: "unity/windows-2019"
+            size: "large"
+            editor_version: "2021.3.2f1"
+            target_platform: "windows-il2cpp"
+          project-path: "Unity2D-Demo-Game-CI-CD/src"
+          custom-parameters: "-testFilter EnemyMovesLeft -customParam1 potato -customParam2 $CIRCLE_WORKFLOW_ID"
+          test-platform: "playmode"
+          filters: *filters
+          context: orb-testing-unity
+          pre-steps: *mono
       - unity/test:
           name: "test-osx"
           step-name: "Check if the tests run and results are uploaded"
@@ -132,6 +166,22 @@ workflows:
           filters: *filters
           context: orb-testing-unity
           pre-steps: *mono
+      - unity/test:
+          name: "test-osx-with-custom-parameters"
+          step-name: "Check if test filter in custom parameter works"
+          unity-license-var-name: "UNITY_ENCODED_LICENSE_2021"
+          unity-username-var-name: "UNITY_USERNAME"
+          unity-password-var-name: "UNITY_PASSWORD"
+          executor:
+            name: "unity/macos"
+            editor_version: "2021.3.1f1"
+            resource_class: "large"
+          project-path: "Unity2D-Demo-Game-CI-CD/src"
+          custom-parameters: "-testFilter EnemyMovesLeft -customParam1 potato -customParam2 $CIRCLE_WORKFLOW_ID"
+          test-platform: "playmode"
+          filters: *filters
+          context: orb-testing-unity
+          pre-steps: *mono
 
       # IL2CPP Builds
       - unity/build:
@@ -428,8 +478,11 @@ workflows:
           requires:
             - orb-tools/pack
             - test-linux
+            - test-linux-with-custom-parameters
             - test-windows
+            - test-windows-with-custom-parameters
             - test-osx
+            - test-osx-with-custom-parameters
             - build-linux64-il2cpp
             - build-Windows64-il2cpp
             - build-osx-il2cpp
diff --git a/src/commands/test.yml b/src/commands/test.yml
index 74cbe9a..32e6325 100644
--- a/src/commands/test.yml
+++ b/src/commands/test.yml
@@ -34,6 +34,14 @@ parameters:
     type: string
     default: "10m"
     description: Elapsed time the command can run without output.
+  custom-parameters:
+    type: string
+    default: ""
+    description: |
+      Additional arguments for the Unity CLI.
+      Use it to pass arguments to Unity's test options. Environment variables are supported.
+      The parameters must be separated by space and must be in the format "-key value" or "-key" for booleans.
+      Example: '-testFilter "MyNamespace.Something.MyTest" -assemblyNames "MyUnitTestAssembly" -testCategory "Unit;Integration"'.
 
 steps:
   - run:
@@ -42,6 +50,7 @@ steps:
       environment:
         PARAM_PROJECT_PATH: << parameters.project-path >>
         PARAM_TEST_PLATFORM: << parameters.test-platform >>
+        PARAM_CUSTOM_PARAMETERS: << parameters.custom-parameters >>
         SCRIPT_TEST_LINUX: << include(scripts/linux/test.sh) >>
         SCRIPT_TEST_WINDOWS: << include(scripts/windows/test.sh) >>
         SCRIPT_TEST_MACOS: << include(scripts/macos/test.sh) >>
diff --git a/src/jobs/test.yml b/src/jobs/test.yml
index 632f73e..9a21adf 100644
--- a/src/jobs/test.yml
+++ b/src/jobs/test.yml
@@ -56,6 +56,14 @@ parameters:
     type: string
     default: "20m"
     description: Elapsed time the command can run without output.
+  custom-parameters:
+    type: string
+    default: ""
+    description: |
+      Additional arguments for the Unity CLI.
+      Use it to pass arguments to Unity's test options. Environment variables are supported.
+      The parameters must be separated by space and must be in the format "-key value" or "-key" for booleans.
+      Example: '-testFilter "MyNamespace.Something.MyTest" -assemblyNames "MyUnitTestAssembly" -testCategory "Unit;Integration"'.
 
 executor: << parameters.executor >>
 
@@ -73,6 +81,7 @@ steps:
       test-platform: << parameters.test-platform >>
       project-path: << parameters.project-path >>
       no_output_timeout: << parameters.no_output_timeout>>
+      custom-parameters: << parameters.custom-parameters >>
   - when:
       condition: <<parameters.return-license>>
       steps:
diff --git a/src/scripts/linux/test.sh b/src/scripts/linux/test.sh
index 0008a52..0d4de6b 100644
--- a/src/scripts/linux/test.sh
+++ b/src/scripts/linux/test.sh
@@ -2,55 +2,54 @@
 # shellcheck shell=bash
 # shellcheck disable=SC2154
 
-trap_test_script_exit() {
-  local -r exit_status="$?"
-
-  if [ "$exit_status" -ne 0 ]; then
-    printf '%s\n' 'The script did not complete successfully.'
-    printf '%s\n' "The exit code was $exit_status"
-
-    rm -rf "$gameci_sample_project_dir"
-    exit "$exit_status"
-  fi
-
+parse_results_to_junit() {
   # Intall dependencies for the JUnit parser.
   apt-get update && apt-get install -y default-jre libsaxonb-java
 
   # Parse Unity's results xml to JUnit format.
-  printf '%s\n' "$DEPENDENCY_NUNIT_TRANSFORM" > "$base_dir/nunit3-junit.xslt"
-  saxonb-xslt -s "$UNITY_DIR/$TEST_PLATFORM-results.xml" -xsl "$base_dir/nunit3-junit.xslt" > "$UNITY_DIR/$TEST_PLATFORM-junit-results.xml"
-  
-  cat "$UNITY_DIR/$TEST_PLATFORM-junit-results.xml"
-
-  # Clean up.
-  rm -rf "$gameci_sample_project_dir"
+  printf '%s\n' "$DEPENDENCY_NUNIT_TRANSFORM" >"$base_dir/nunit3-junit.xslt"
+  saxonb-xslt -s "$unity_project_full_path/$PARAM_TEST_PLATFORM-results.xml" -xsl "$base_dir/nunit3-junit.xslt" >"$unity_project_full_path/$PARAM_TEST_PLATFORM-junit-results.xml"
 }
 
-# Download test script.
-curl --silent --location \
-  --request GET \
-  --url "https://gitlab.com/game-ci/unity3d-gitlab-ci-example/-/raw/main/ci/test.sh" \
-  --header 'Accept: application/vnd.github.v3+json' \
-  --output "$base_dir/test.sh"
-
-chmod +x "$base_dir/test.sh"
-
-# Name variables as required by the "test.sh" script.
-readonly TEST_PLATFORM="$PARAM_TEST_PLATFORM"
-readonly TESTING_TYPE="JUNIT"
-readonly UNITY_DIR="$unity_project_full_path"
-readonly CI_PROJECT_DIR="$gameci_sample_project_dir"
-readonly CI_PROJECT_NAME="$CIRCLE_PROJECT_REPONAME"
-
-export TEST_PLATFORM
-export TESTING_TYPE
-export UNITY_DIR
-export CI_PROJECT_DIR
-export CI_PROJECT_NAME
-
-# Trap "test.sh" exit otherwise it won't be possible to parse the results to JUnit format.
-trap trap_test_script_exit EXIT
-
-# Run the test script.
-# shellcheck source=/dev/null
-source "$base_dir/test.sh"
\ No newline at end of file
+set -x
+# shellcheck disable=SC2086 # $custom_parameters needs to be unquoted. Otherwise it will be treated as a single parameter.
+${UNITY_EXECUTABLE:-xvfb-run --auto-servernum --server-args='-screen 0 640x480x24' unity-editor} \
+  -projectPath "$unity_project_full_path" \
+  -runTests \
+  -testPlatform "$PARAM_TEST_PLATFORM" \
+  -testResults "$unity_project_full_path"/"$PARAM_TEST_PLATFORM"-results.xml \
+  -logFile /dev/stdout \
+  -batchmode \
+  -nographics \
+  -enableCodeCoverage \
+  -coverageResultsPath "$unity_project_full_path"/"$PARAM_TEST_PLATFORM"-coverage \
+  -coverageOptions "generateAdditionalMetrics;generateHtmlReport;generateHtmlReportHistory;generateBadgeReport;" \
+  -debugCodeOptimization \
+  $custom_parameters
+unity_exit_code=$?
+set +x
+
+if [ "$unity_exit_code" -eq 0 ] || [ "$unity_exit_code" -eq 2 ]; then
+  printf '%s\n' "Run succeeded. Exit code $unity_exit_code"
+  parse_results_to_junit
+  # Print the results to the console.
+  cat "$unity_project_full_path/$PARAM_TEST_PLATFORM-junit-results.xml"
+else
+  printf '%s\n' "Run failed. Exit code $unity_exit_code"
+fi
+
+code_coverage_package="com.unity.testtools.codecoverage"
+package_manifest_path="$unity_project_full_path/Packages/manifest.json"
+
+# Check if the Code Coverage package is installed and move the coverage results to the root of the project.
+if grep -q "$code_coverage_package" "$package_manifest_path"; then
+  grep "$unity_project_full_path"/"$PARAM_TEST_PLATFORM"-coverage/Report/Summary.xml Linecoverage
+  mv "$unity_project_full_path"/"$PARAM_TEST_PLATFORM"-coverage/"$CIRCLE_PROJECT_REPONAME"-opencov/*Mode/TestCoverageResults_*.xml "$unity_project_full_path"/"$PARAM_TEST_PLATFORM"-coverage/coverage.xml
+  rm -r "$unity_project_full_path"/"$PARAM_TEST_PLATFORM"-coverage/"$CIRCLE_PROJECT_REPONAME"-opencov/
+else
+  {
+    echo -e "\033[33mCode Coverage package not found in $package_manifest_path. Please install the package \"Code Coverage\" through Unity's Package Manager to enable coverage reports.\033[0m"
+  } 2>/dev/null
+fi
+
+exit "$unity_exit_code"
diff --git a/src/scripts/macos/test.sh b/src/scripts/macos/test.sh
index dacd4ba..9ed053f 100644
--- a/src/scripts/macos/test.sh
+++ b/src/scripts/macos/test.sh
@@ -71,6 +71,7 @@ parse_xml_to_junit() {
 
 set -x
 # Run the tests.
+# shellcheck disable=SC2086 # $custom_parameters needs to be unquoted. Otherwise it will be treated as a single parameter.
 "$UNITY_EDITOR_PATH" \
   -batchmode \
   -nographics \
@@ -78,7 +79,8 @@ set -x
   -runTests \
   -testPlatform "$PARAM_TEST_PLATFORM" \
   -testResults "$base_dir/results.xml" \
-  -logfile /dev/stdout
+  -logfile /dev/stdout \
+  $custom_parameters
 
 unity_exit_code=$?
 set +x
diff --git a/src/scripts/test.sh b/src/scripts/test.sh
index 4f8b2ce..203615b 100644
--- a/src/scripts/test.sh
+++ b/src/scripts/test.sh
@@ -10,6 +10,9 @@ eval "$SCRIPT_UTILS"
 # Detect host OS.
 detect-os
 
+# Expand custom parameters, if any.
+custom_parameters="$(eval echo "$PARAM_CUSTOM_PARAMETERS")" && readonly custom_parameters
+
 if [ "$PLATFORM" = "linux" ]; then eval "$SCRIPT_TEST_LINUX";
 elif [ "$PLATFORM" = "macos" ]; then eval "$SCRIPT_TEST_MACOS";
 elif [ "$PLATFORM" = "windows" ]; then eval "$SCRIPT_TEST_WINDOWS";
diff --git a/src/scripts/windows/test.sh b/src/scripts/windows/test.sh
index db7bf85..6d217c4 100644
--- a/src/scripts/windows/test.sh
+++ b/src/scripts/windows/test.sh
@@ -1,6 +1,6 @@
 #!/bin/false
 # shellcheck shell=bash
-# shellcheck disable=SC2154
+# shellcheck disable=SC2154,SC2016
 
 trap_exit() {
   local exit_status="$?"
@@ -16,11 +16,25 @@ trap_exit() {
 }
 trap trap_exit EXIT
 
-# Add the build target and build name in the environment variables.
+# Add necessary values in the environment variables.
 docker exec "$CONTAINER_NAME" powershell "[System.Environment]::SetEnvironmentVariable('TEST_PLATFORM','$PARAM_TEST_PLATFORM', [System.EnvironmentVariableTarget]::Machine)"
+docker exec "$CONTAINER_NAME" powershell "[System.Environment]::SetEnvironmentVariable('CUSTOM_PARAMS','$custom_parameters', [System.EnvironmentVariableTarget]::Machine)"
+
+test_args=(
+  '-batchmode'
+  '-nographics'
+  '-projectPath $Env:PROJECT_PATH'
+  '-runTests'
+  '-testPlatform $Env:TEST_PLATFORM'
+  '-testResults "C:/test/results.xml"'
+)
+
+[ -n "$custom_parameters" ] && test_args+=( '$Env:CUSTOM_PARAMS.split()' )
 
 # Run the tests.
-docker exec "$CONTAINER_NAME" powershell '& "C:\Program Files\Unity\Hub\Editor\*\Editor\Unity.exe" -batchmode -nographics -projectPath $Env:PROJECT_PATH -runTests -testPlatform $Env:TEST_PLATFORM -testResults "C:/test/results.xml" -logfile | Out-Host'
+set -x
+docker exec "$CONTAINER_NAME" powershell "& 'C:\Program Files\Unity\Hub\Editor\*\Editor\Unity.exe' ${test_args[*]} -logfile | Out-Host"
+set +x
 
 # Install JDK to run Saxon.
 docker exec "$CONTAINER_NAME" powershell 'choco upgrade jdk8 --no-progress -y'