diff --git a/tests/suites/test_suite_mps.data b/tests/suites/test_suite_mps.data
index e9bc43d..b7333a3 100644
--- a/tests/suites/test_suite_mps.data
+++ b/tests/suites/test_suite_mps.data
@@ -24,3 +24,6 @@
 
 MPS Reader: Pausing needed but disabled
 mbedtls_mps_reader_pausing_needed_disabled:
+
+MPS Reader: Pausing needed + enabled, but buffer too small
+mbedtls_mps_reader_pausing_needed_buffer_too_small:
diff --git a/tests/suites/test_suite_mps.function b/tests/suites/test_suite_mps.function
index aeaad27..f5bb95b 100644
--- a/tests/suites/test_suite_mps.function
+++ b/tests/suites/test_suite_mps.function
@@ -236,3 +236,36 @@
     mbedtls_reader_free( &rd );
 }
 /* END_CASE */
+
+/* BEGIN_CASE depends_on:TEST_SUITE_MPS_READER */
+void mbedtls_mps_reader_pausing_needed_buffer_too_small()
+{
+    /* This test exercises the behaviour of the MPS reader with accumulator
+     * in the situation where a read requests goes beyond the bounds of the
+     * current read buffer, _and_ the reader's accumulator is too small to
+     * hold the requested amount of data.
+     *
+     * In this case, we expect the reader to fail. */
+
+    unsigned char buf[100];
+    unsigned char acc[10];
+    unsigned char *tmp;
+    mbedtls_reader rd;
+    for( int i=0; (unsigned) i < sizeof( buf ); i++ )
+        buf[i] = (unsigned char) i;
+
+    /* Preparation (lower layer) */
+    mbedtls_reader_init( &rd, acc, sizeof( acc ) );
+    TEST_ASSERT( mbedtls_reader_feed( &rd, buf, sizeof( buf ) ) == 0 );
+    /* Consumption (upper layer) */
+    TEST_ASSERT( mbedtls_reader_get( &rd, 50, &tmp, NULL ) == 0 );
+    ASSERT_COMPARE( tmp, 50, buf, 50 );
+    TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
+    TEST_ASSERT( mbedtls_reader_get( &rd, 100, &tmp, NULL ) ==
+                 MBEDTLS_ERR_MPS_READER_OUT_OF_DATA );
+    /* Wrapup (lower layer) */
+    TEST_ASSERT( mbedtls_reader_reclaim( &rd, NULL ) ==
+                 MBEDTLS_ERR_MPS_READER_ACCUMULATOR_TOO_SMALL );
+    mbedtls_reader_free( &rd );
+}
+/* END_CASE */