diff --git a/.github/workflows/test_build.yaml b/.github/workflows/test_build.yaml
index dd8066a..bc0092f 100644
--- a/.github/workflows/test_build.yaml
+++ b/.github/workflows/test_build.yaml
@@ -30,7 +30,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-13, ubuntu-24.04-arm]
+        os: [ubuntu-latest, windows-latest, macos-13]
         # https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json
         python-version: ["3.9", "3"]
     steps:
diff --git a/src/besapi/besapi.py b/src/besapi/besapi.py
index c9d8150..cacaab8 100644
--- a/src/besapi/besapi.py
+++ b/src/besapi/besapi.py
@@ -29,7 +29,7 @@
 import requests
 import urllib3.poolmanager
 
-__version__ = "4.0.2"
+__version__ = "4.1.2"
 
 besapi_logger = logging.getLogger("besapi")
 
@@ -615,7 +615,7 @@ def session_relevance_xml(self, relevance, **kwargs):
         return RESTResult(
             self.session.post(
                 self.url("query"),
-                data=f"relevance={urllib.parse.quote(relevance, safe=':+')}",
+                data=f"relevance={urllib.parse.quote(relevance, safe=':')}",
                 verify=self.verify,
                 **kwargs,
             )
diff --git a/tests/test_besapi.py b/tests/test_besapi.py
index a70973d..57a4e34 100644
--- a/tests/test_besapi.py
+++ b/tests/test_besapi.py
@@ -312,6 +312,58 @@ def test_bes_conn_json():
         assert result is not None
         assert "TestString" in result
         assert "BES Support" in result
+        print("testing session relevance with + in relevance")
+        str_relevance_plus = 'lengths of first matches (regex " +") of "        "'
+        result = bes_conn.session_relevance_xml(str_relevance_plus)
+        print(result)
+        assert result is not None
+    else:
+        pytest.skip("Skipping BESConnection test, no config file or login failed.")
+
+
+def test_bes_conn_session_relevance_with_plus():
+    """Test the BESConnection class with JSON output."""
+
+    bes_conn = besapi.plugin_utilities.get_besapi_connection(None)
+
+    if bes_conn and bes_conn.login():
+        print("testing session relevance with + in relevance")
+        str_relevance_plus = 'lengths of first matches (regex " +") of "        "'
+        str_relevance_answer = "8"
+        result = bes_conn.session_relevance_xml(str_relevance_plus)
+        print(result)
+        assert result is not None
+        print(result.request.request.body)
+        assert f'<Answer type="integer">{str_relevance_answer}</Answer>' in str(result)
+        result = bes_conn.session_relevance_json_string(str_relevance_plus)
+        print(result)
+        assert result is not None
+        assert str_relevance_answer in str(result)
+        result = bes_conn.session_relevance_json(str_relevance_plus)
+        print(result)
+        assert result is not None
+        assert f"[{str_relevance_answer}]" in str(result["result"])
+        result = bes_conn.session_relevance_string(str_relevance_plus)
+        print(result)
+        assert result is not None
+        assert str_relevance_answer in str(result)
+        result = bes_conn.session_relevance_array(str_relevance_plus)
+        print(result)
+        assert result is not None
+        assert f"['{str_relevance_answer}']" in str(result)
+        result = bes_conn.session_relevance_json_array(str_relevance_plus)
+        print(result)
+        assert result is not None
+        assert f"[{str_relevance_answer}]" in str(result)
+
+        # test already escaped +
+        str_relevance_plus = r'lengths of first matches (regex " %2b") of "        "'
+        print(str_relevance_plus)
+        result = bes_conn.session_relevance_xml(str_relevance_plus)
+        print(result)
+        assert result is not None
+        print(result.request.request.body)
+        assert f'<Answer type="integer">{str_relevance_answer}</Answer>' in str(result)
     else:
         pytest.skip("Skipping BESConnection test, no config file or login failed.")