diff --git a/.github/workflows/osrm-backend.yml b/.github/workflows/osrm-backend.yml
index eb4fc4f3f..c83eb45c1 100644
--- a/.github/workflows/osrm-backend.yml
+++ b/.github/workflows/osrm-backend.yml
@@ -531,14 +531,7 @@ jobs:
 
         # All tests assume to be run from the build directory
         pushd ${OSRM_BUILD_DIR}
-        ./unit_tests/library-tests
-        ./unit_tests/extractor-tests
-        ./unit_tests/contractor-tests
-        ./unit_tests/engine-tests
-        ./unit_tests/util-tests
-        ./unit_tests/server-tests
-        ./unit_tests/partitioner-tests
-        ./unit_tests/customizer-tests
+        for i in ./unit_tests/*-tests ; do echo Running $i ; $i ; done
         if [ -z "${ENABLE_SANITIZER}" ] && [ "$TARGET_ARCH" != "i686" ]; then
           npm run nodejs-tests
         fi
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9677e130e..de89940e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
       - CHANGED: Upgrade Boost dependency to 1.70 [#6113](https://github.com/Project-OSRM/osrm-backend/pull/6113)
       - CHANGED: Upgrade Ubuntu CI builds to 20.04  [#6119](https://github.com/Project-OSRM/osrm-backend/pull/6119)
       - CHANGED: Make building osrm-routed optional [#6144](https://github.com/Project-OSRM/osrm-backend/pull/6144)
+      - FIXED: Run all unit tests in CI [#5248](https://github.com/Project-OSRM/osrm-backend/pull/5248)
 
 # 5.26.0
   - Changes from 5.25.0
diff --git a/include/util/geojson_validation.hpp b/include/util/geojson_validation.hpp
index 40b986df1..8482395be 100644
--- a/include/util/geojson_validation.hpp
+++ b/include/util/geojson_validation.hpp
@@ -76,6 +76,14 @@ inline void validateFeature(const rapidjson::Value &feature)
     const auto coord_array = feature["geometry"].GetObject()["coordinates"].GetArray();
     if (coord_array.Empty())
         throw osrm::util::exception("Feature geometry coordinates member is empty.");
+
+    if (feature["geometry"]["type"] == "polygon" || feature["geometry"]["type"] == "Polygon")
+    {
+        if (!coord_array[0].IsArray() || !coord_array[0][0].IsArray())
+        {
+            throw osrm::util::exception("Polygon geometry missing outer ring");
+        }
+    }
 }
 } // namespace util
 } // namespace osrm
diff --git a/src/util/timezones.cpp b/src/util/timezones.cpp
index 30e7b51b4..948f34855 100644
--- a/src/util/timezones.cpp
+++ b/src/util/timezones.cpp
@@ -110,14 +110,23 @@ void Timezoner::LoadLocalTimesRTree(rapidjson::Document &geojson, std::time_t ut
         // time zone geojson specific checks
         const auto &feature = features_array[i].GetObject();
         const auto &properties = feature["properties"].GetObject();
-        if (!properties.HasMember("tzid"))
+        std::string tzid_key = "tzid";
+        if (properties.HasMember("tzid"))
+        {
+            if (!properties["tzid"].IsString())
+                throw osrm::util::exception("Feature has non-string 'tzid' value.");
+            tzid_key = "tzid";
+        }
+        else if (properties.HasMember("TZID"))
+        {
+            if (!properties["TZID"].IsString())
+                throw osrm::util::exception("Feature has non-string 'TZID' value.");
+            tzid_key = "TZID";
+        }
+        else
         {
             throw osrm::util::exception("Feature is missing 'tzid' member in properties.");
         }
-        else if (!properties["tzid"].IsString())
-        {
-            throw osrm::util::exception("Feature has non-string 'tzid' value.");
-        }
 
         // Case-sensitive check of type https://tools.ietf.org/html/rfc7946#section-1.4
         const auto &geometry = feature["geometry"].GetObject();
@@ -137,7 +146,7 @@ void Timezoner::LoadLocalTimesRTree(rapidjson::Document &geojson, std::time_t ut
                                   local_times.size());
 
             // Get time zone name and emplace polygon and local time for the UTC input
-            const auto &tzname = properties["tzid"].GetString();
+            const auto &tzname = properties[tzid_key.c_str()].GetString();
             local_times.push_back(local_time_t{polygon, get_local_time_in_tz(tzname)});
         }
         else
diff --git a/unit_tests/library/extract.cpp b/unit_tests/library/extract.cpp
index 23f5ea0d9..aa18c7552 100644
--- a/unit_tests/library/extract.cpp
+++ b/unit_tests/library/extract.cpp
@@ -20,6 +20,8 @@ BOOST_AUTO_TEST_CASE(test_extract_with_valid_config)
     osrm::ExtractorConfig config;
     config.input_path = OSRM_TEST_DATA_DIR "/monaco.osm.pbf";
     config.UseDefaultOutputNames(OSRM_TEST_DATA_DIR "/monaco.osm.pbf");
+    config.profile_path = OSRM_TEST_DATA_DIR "/../../profiles/car.lua";
+    config.small_component_size = 1000;
     config.requested_num_threads = std::thread::hardware_concurrency();
     BOOST_CHECK_NO_THROW(osrm::extract(config));
 }
diff --git a/unit_tests/updater/timezoner.cpp b/unit_tests/updater/timezoner.cpp
index 543c14312..9f4a3744a 100644
--- a/unit_tests/updater/timezoner.cpp
+++ b/unit_tests/updater/timezoner.cpp
@@ -53,5 +53,19 @@ BOOST_AUTO_TEST_CASE(timezoner_test)
         "48.88277], [8.57757, 49.07206], [8.28369, "
         "49.07206], [8.28369, 48.88277]]] }} ]}";
     BOOST_CHECK_THROW(Timezoner tz(missing_featc, now), util::exception);
+
+    char missing_tzid[] = "{ \"type\" : \"Feature\","
+                          "\"properties\" : { }, \"geometry\" : { \"type\": \"polygon\", "
+                          "\"coordinates\": [[[8.28369,48.88277], [8.57757, "
+                          "48.88277], [8.57757, 49.07206], [8.28369, "
+                          "49.07206], [8.28369, 48.88277]]] }}";
+    BOOST_CHECK_THROW(Timezoner tz(missing_tzid, now), util::exception);
+
+    char tzid_err[] = "{ \"type\" : \"Feature\","
+                      "\"properties\" : { \"TZID\" : []}, \"geometry\" : { \"type\": \"polygon\", "
+                      "\"coordinates\": [[[8.28369,48.88277], [8.57757, "
+                      "48.88277], [8.57757, 49.07206], [8.28369, "
+                      "49.07206], [8.28369, 48.88277]]] }}";
+    BOOST_CHECK_THROW(Timezoner tz(tzid_err, now), util::exception);
 }
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/unit_tests/updater/validation.cpp b/unit_tests/updater/validation.cpp
index b68c34528..177dc52d5 100644
--- a/unit_tests/updater/validation.cpp
+++ b/unit_tests/updater/validation.cpp
@@ -65,22 +65,6 @@ BOOST_AUTO_TEST_CASE(timezone_validation_test)
     doc.Parse(nonobj_props);
     BOOST_CHECK_THROW(util::validateFeature(doc), util::exception);
 
-    char missing_tzid[] = "{ \"type\" : \"Feature\","
-                          "\"properties\" : { }, \"geometry\" : { \"type\": \"polygon\", "
-                          "\"coordinates\": [[[8.28369,48.88277], [8.57757, "
-                          "48.88277], [8.57757, 49.07206], [8.28369, "
-                          "49.07206], [8.28369, 48.88277]]] }}";
-    doc.Parse(missing_tzid);
-    BOOST_CHECK_THROW(util::validateFeature(doc), util::exception);
-
-    char tzid_err[] = "{ \"type\" : \"Feature\","
-                      "\"properties\" : { \"TZID\" : []}, \"geometry\" : { \"type\": \"polygon\", "
-                      "\"coordinates\": [[[8.28369,48.88277], [8.57757, "
-                      "48.88277], [8.57757, 49.07206], [8.28369, "
-                      "49.07206], [8.28369, 48.88277]]] }}";
-    doc.Parse(tzid_err);
-    BOOST_CHECK_THROW(util::validateFeature(doc), util::exception);
-
     char missing_geom[] = "{ \"type\" : \"Feature\","
                           "\"properties\" : { \"TZID\" : \"Europe/Berlin\"}, \"geometries\" : { "
                           "\"type\": \"polygon\", "