diff --git a/scripts/mbedtls_dev/ecp.py b/scripts/mbedtls_dev/ecp.py
index 59a0f31d2..713dd96df 100644
--- a/scripts/mbedtls_dev/ecp.py
+++ b/scripts/mbedtls_dev/ecp.py
@@ -24,3 +24,30 @@ class EcpTarget(test_data_generation.BaseTarget):
     #pylint: disable=abstract-method, too-few-public-methods
     """Target for ecp test case generation."""
     target_basename = 'test_suite_ecp.generated'
+
+class EcpQuasiReduction(ecp_common.EcpOperationCommon,
+                        EcpTarget):
+    """Test cases for ecp quasi_reduction()."""
+    symbol = "-"
+    test_function = "ecp_quasi_reduction"
+    test_name = "mbedtls_ecp_quasi_reduction"
+    input_style = "fixed"
+    arity = 1
+
+    # Extend the default values with n < x < 2n
+    input_values = ecp_common.EcpOperationCommon.input_values + [
+            "73",
+            "ebeddd7b4fefae8755bbfb9c181a73347096b3ec70d1a021",
+            ("1f4e1d074d0b50e8d8818f9a9e5df9959f902bb955fd24fd3d791175226ad8c1"
+             "fcb6d59fa41a3dcb25412009e5e356eb65b50ca67782285290420b45b32f0d63"
+             "7c9ee549a52ad8d631ba4945435c9aec77227ec59faff878b71b920a3d631929"
+             "d636c9a409d6ffdcd95e2568e128596811fb9ade15e69f6efd509381ebbf3599")
+            ] # type: List[str]
+
+    def result(self) -> List[str]:
+        result = self.int_a % self.int_n
+        return [self.format_result(result)]
+
+    @property
+    def is_valid(self) -> bool:
+        return bool(self.int_a < 2 * self.int_n)