diff --git a/src/test/java/com/fasterxml/jackson/core/ErrorReportConfigurationTest.java b/src/test/java/com/fasterxml/jackson/core/ErrorReportConfigurationTest.java
index 48458ba0e1..363d13e6e8 100644
--- a/src/test/java/com/fasterxml/jackson/core/ErrorReportConfigurationTest.java
+++ b/src/test/java/com/fasterxml/jackson/core/ErrorReportConfigurationTest.java
@@ -4,16 +4,24 @@
 import static org.junit.jupiter.api.Assertions.fail;
 import org.junit.jupiter.api.Test;
 
+/**
+ * Unit tests for class {@link ErrorReportConfiguration}.
+ * 
+ * @since 2.16
+ */
 public class ErrorReportConfigurationTest
 {
+    private final ErrorReportConfiguration DEFAULTS = ErrorReportConfiguration.defaults();
+
     @Test
-    public void testMaxErrorTokenLength()
+    public void testZeroLengths()
     {
         ErrorReportConfiguration.Builder builder = new ErrorReportConfiguration.Builder();
-        int maxLength = 128;
-        builder.maxErrorTokenLength(maxLength);
+        builder.maxErrorTokenLength(0);
+        builder.maxRawContentLength(0);
         ErrorReportConfiguration config = builder.build();
-        assertEquals(maxLength, config.getMaxErrorTokenLength());
+        assertEquals(0, config.getMaxErrorTokenLength());
+        assertEquals(0, config.getMaxRawContentLength());
     }
 
     @Test
@@ -53,11 +61,9 @@ public void testInvalidMaxRawContentLength()
     @Test
     public void testDefaults()
     {
-        ErrorReportConfiguration config = ErrorReportConfiguration.defaults();
-        
         // default value
-        assertEquals(ErrorReportConfiguration.DEFAULT_MAX_ERROR_TOKEN_LENGTH, config.getMaxErrorTokenLength());
-        assertEquals(ErrorReportConfiguration.DEFAULT_MAX_RAW_CONTENT_LENGTH, config.getMaxRawContentLength());
+        assertEquals(ErrorReportConfiguration.DEFAULT_MAX_ERROR_TOKEN_LENGTH, DEFAULTS.getMaxErrorTokenLength());
+        assertEquals(ErrorReportConfiguration.DEFAULT_MAX_RAW_CONTENT_LENGTH, DEFAULTS.getMaxRawContentLength());
 
         // equals
         assertEquals(ErrorReportConfiguration.defaults(), ErrorReportConfiguration.defaults());
@@ -66,23 +72,26 @@ public void testDefaults()
     @Test
     public void testOverrideDefaultErrorReportConfiguration()
     {
-        // try override static
-        ErrorReportConfiguration newConfig = new ErrorReportConfiguration.Builder()
+        // try with null, no change
+        ErrorReportConfiguration nullDefaults = ErrorReportConfiguration.defaults();
+        ErrorReportConfiguration.overrideDefaultErrorReportConfiguration(null);
+        assertEquals(ErrorReportConfiguration.DEFAULT_MAX_ERROR_TOKEN_LENGTH, nullDefaults.getMaxErrorTokenLength());
+        assertEquals(ErrorReportConfiguration.DEFAULT_MAX_RAW_CONTENT_LENGTH, nullDefaults.getMaxRawContentLength());
+        
+        // try override defaults
+        ErrorReportConfiguration overrideDefaults = new ErrorReportConfiguration.Builder()
                 .maxErrorTokenLength(128)
                 .maxRawContentLength(256)
                 .build();
-        ErrorReportConfiguration.overrideDefaultErrorReportConfiguration(newConfig);
-        
-        ErrorReportConfiguration config = ErrorReportConfiguration.defaults();
-        assertEquals(128, config.getMaxErrorTokenLength());
-        assertEquals(256, config.getMaxRawContentLength());
+        ErrorReportConfiguration.overrideDefaultErrorReportConfiguration(overrideDefaults);
+        assertEquals(128, overrideDefaults.getMaxErrorTokenLength());
+        assertEquals(256, overrideDefaults.getMaxRawContentLength());
         
         // IMPORTANT : make sure to revert back, otherwise other tests will be affected
-        ErrorReportConfiguration defaultConfig = new ErrorReportConfiguration.Builder()
+        ErrorReportConfiguration.overrideDefaultErrorReportConfiguration(new ErrorReportConfiguration.Builder()
                 .maxErrorTokenLength(ErrorReportConfiguration.DEFAULT_MAX_ERROR_TOKEN_LENGTH)
                 .maxRawContentLength(ErrorReportConfiguration.DEFAULT_MAX_RAW_CONTENT_LENGTH)
-                .build();
-        ErrorReportConfiguration.overrideDefaultErrorReportConfiguration(defaultConfig);
+                .build());
     }
 
     @Test
@@ -93,4 +102,27 @@ public void testRebuild()
         assertEquals(config.getMaxErrorTokenLength(), rebuiltConfig.getMaxErrorTokenLength());
         assertEquals(config.getMaxRawContentLength(), rebuiltConfig.getMaxRawContentLength());
     }
+
+
+    @Test
+    public void testBuilderConstructorWithTwoParams()
+    {
+        ErrorReportConfiguration.Builder builder = new ErrorReportConfiguration.Builder(128, 256);
+        ErrorReportConfiguration config = builder.build();
+        assertEquals(128, config.getMaxErrorTokenLength());
+        assertEquals(256, config.getMaxRawContentLength());
+    }
+
+    @Test
+    public void testBuilderConstructorWithErrorReportConfiguration()
+    {
+        ErrorReportConfiguration newConfig = new ErrorReportConfiguration.Builder()
+                .maxErrorTokenLength(128)
+                .maxRawContentLength(256)
+                .build();
+        ErrorReportConfiguration.Builder builder = new ErrorReportConfiguration.Builder(newConfig);
+        ErrorReportConfiguration config = builder.build();
+        assertEquals(newConfig.getMaxErrorTokenLength(), config.getMaxErrorTokenLength());
+        assertEquals(newConfig.getMaxRawContentLength(), config.getMaxRawContentLength());
+    }
 }