diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 43086e1..6374c2a 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -24,12 +24,18 @@
 
 jobs:
   build:
-    name: Test on JDK ${{ matrix.java_version }}
+    name: Test on JDK ${{ matrix.java_version }} locale ${{ matrix.locale }}
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
         java_version: [ 11, 17, 21 ]
+        include:
+          - locale: en_US
+          # Use a different locale when running against one of the java versions
+          # to ensure we correctly write tests that account for localization differences.
+          - locale: de_AT
+            java_version: 21
 
     steps:
       - name: Checkout for build
@@ -49,6 +55,12 @@
       - name: Yasson install
         run: mvn -U -C clean install -DskipTests
       - name: Yasson tests
-        run: mvn -U -B -C -Dmaven.javadoc.skip=true verify
+        run: |
+          export LANG_TAG="${{ matrix.locale }}"
+          mvn -U -B -C \
+            -Dmaven.javadoc.skip=true \
+            -Duser.language="${LANG_TAG%%_*}" \
+            -Duser.country="${LANG_TAG##*_}" \
+            verify
       - name: JSONB-API TCK
         run: cd yasson-tck && mvn -U -B test -DargLine="-Djava.locale.providers=COMPAT"
diff --git a/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java b/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java
index d49e4a0..5012e78 100644
--- a/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java
+++ b/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java
@@ -351,7 +351,7 @@
         @JsonbDateFormat("dd.MM.yyyy")
         public LocalDate birthDate;
 
-        @JsonbNumberFormat("#0.00")
+        @JsonbNumberFormat(value = "#0.00", locale="en_US")
         public BigDecimal salary;
     }
     
@@ -375,24 +375,25 @@
 
         public LocalDate birthDate;
 
+        @JsonbNumberFormat(value = "#0.00", locale="en_US") // TODO: remove if withNumberFormat is added to JsonbConfig builder
         public BigDecimal salary;
     }
     
-    @Test
+    @Test //TODO https://github.com/eclipse-ee4j/yasson/issues/722
     public void testDateNumberFormats2() {
         Person10 p = new Person10();
         p.name = "Jason Bourne";
         p.birthDate = LocalDate.of(1999, 8, 7);
         p.salary = new BigDecimal("123.45678");
         Jsonb jsonb = JsonbBuilder.create(new JsonbConfig()//
-                .withDateFormat("dd.MM.yyyy", null)); // TODO: why no withNumberFormat?
+                .withDateFormat("dd.MM.yyyy", null)); // TODO: add withNumberFormat if added to JsonbConfig builder
         String json = jsonb.toJson(p);
-        assertEquals("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":123.45678}", json);
+        assertEquals("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":\"123.46\"}", json);
         
-        Person9 after = jsonb.fromJson("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":123.45678}", Person9.class);
+        Person9 after = jsonb.fromJson("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":\"123.46\"}", Person9.class);
         assertEquals(p.name, after.name);
         assertEquals(p.birthDate, after.birthDate);
-        assertEquals(p.salary, after.salary);
+        assertEquals(new BigDecimal("123.46"), after.salary);
     }
     
     public static class Customer {