diff --git a/build.gradle b/build.gradle
index de56bf6f8..73cb95e66 100644
--- a/build.gradle
+++ b/build.gradle
@@ -36,8 +36,6 @@ dependencies {
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.mockito:mockito-inline:4.11.0'
-    testImplementation 'org.springframework:spring-test:5.3.29'
-    testImplementation 'org.springframework:spring-web:5.3.29'
     testImplementation 'jakarta.servlet:jakarta.servlet-api:4.0.4'
 }
 
diff --git a/src/test/java/com/vonage/client/auth/RequestSigningTest.java b/src/test/java/com/vonage/client/auth/RequestSigningTest.java
index 6652c4beb..3d33abb49 100644
--- a/src/test/java/com/vonage/client/auth/RequestSigningTest.java
+++ b/src/test/java/com/vonage/client/auth/RequestSigningTest.java
@@ -20,10 +20,13 @@
 import org.apache.http.message.BasicNameValuePair;
 import static org.junit.Assert.*;
 import org.junit.Test;
+import org.mockito.Mockito;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
-import org.springframework.mock.web.MockHttpServletRequest;
+import javax.servlet.ReadListener;
+import javax.servlet.ServletInputStream;
 import javax.servlet.http.HttpServletRequest;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -231,11 +234,40 @@ private HttpServletRequest constructDummyRequest() {
     }
 
 
-    private HttpServletRequest constructDummyRequestJson() {
-        MockHttpServletRequest request = new MockHttpServletRequest();
+    private HttpServletRequest constructDummyRequestJson() throws Exception  {
+        HttpServletRequest request = Mockito.mock(HttpServletRequest.class);
         String dummyJson = "{\"a\":\"alphabet\",\"b\":\"bananas\",\"timestamp\":\"2100\",\"sig\":\"b7f749de27b4adcf736cc95c9a7e059a16c85127\"}";
-        request.setContent(dummyJson.getBytes());
-        request.setContentType("application/json");
+        Mockito.when(request.getContentType()).thenReturn("application/json");
+        final byte[] contentBytes = dummyJson.getBytes(StandardCharsets.UTF_8);
+        ServletInputStream servletInputStream = new ServletInputStream() {
+            private int index = 0;
+
+            @Override
+            public int read() {
+                if (index < contentBytes.length) {
+                    return contentBytes[index++] & 0xFF;
+                }
+                return -1;
+            }
+
+            @Override
+            public boolean isFinished() {
+                return index >= contentBytes.length;
+            }
+
+            @Override
+            public boolean isReady() {
+                return true;
+            }
+
+            @Override
+            public void setReadListener(ReadListener readListener) {
+                // No need to implement for this example
+            }
+        };
+
+        when(request.getInputStream()).thenReturn(servletInputStream);
+
         return request;
     }