diff --git a/tests/include/test/psa_crypto_helpers.h b/tests/include/test/psa_crypto_helpers.h
index c0f76c8..a280331 100644
--- a/tests/include/test/psa_crypto_helpers.h
+++ b/tests/include/test/psa_crypto_helpers.h
@@ -241,7 +241,9 @@
 int mbedtls_test_inject_entropy_restore(void);
 #endif /* MBEDTLS_PSA_INJECT_ENTROPY */
 
-
+/** Parse binary string and convert it to a long integer
+ */
+uint64_t parse_binary_string(data_t *bin_string);
 
 /** Skip a test case if the given key is a 192 bits AES key and the AES
  *  implementation is at least partially provided by an accelerator or
diff --git a/tests/include/test/psa_exercise_key.h b/tests/include/test/psa_exercise_key.h
index b5e3d35..46f4d08 100644
--- a/tests/include/test/psa_exercise_key.h
+++ b/tests/include/test/psa_exercise_key.h
@@ -119,6 +119,7 @@
  * The inputs \p input1 and \p input2 are, in order:
  * - HKDF: salt, info.
  * - TKS 1.2 PRF, TLS 1.2 PSK-to-MS: seed, label.
+ * - PBKDF2: input cost, salt.
  *
  * \param operation         The operation object to use.
  *                          It must be in the initialized state.
diff --git a/tests/src/psa_crypto_helpers.c b/tests/src/psa_crypto_helpers.c
index cab96ab..18eac06 100644
--- a/tests/src/psa_crypto_helpers.c
+++ b/tests/src/psa_crypto_helpers.c
@@ -149,6 +149,17 @@
     }
 }
 
+uint64_t parse_binary_string(data_t *bin_string)
+{
+    uint64_t result = 0;
+    TEST_LE_U(bin_string->len, 8);
+    for (size_t i = 0; i < bin_string->len; i++) {
+        result = result << 8 | bin_string->x[i];
+    }
+exit:
+    return result; /* returns 0 if len > 8 */
+}
+
 #if defined(MBEDTLS_PSA_INJECT_ENTROPY)
 
 #include <mbedtls/entropy.h>
diff --git a/tests/src/psa_exercise_key.c b/tests/src/psa_exercise_key.c
index 9ff408c..8335977 100644
--- a/tests/src/psa_exercise_key.c
+++ b/tests/src/psa_exercise_key.c
@@ -437,6 +437,18 @@
         PSA_ASSERT(psa_key_derivation_input_bytes(operation,
                                                   PSA_KEY_DERIVATION_INPUT_LABEL,
                                                   input2, input2_length));
+    } else if (PSA_ALG_IS_PBKDF2(alg)) {
+        data_t input_cost = { (unsigned char *) input1, (uint32_t) input1_length };
+        PSA_ASSERT(psa_key_derivation_input_integer(operation,
+                                                    PSA_KEY_DERIVATION_INPUT_COST,
+                                                    parse_binary_string(&input_cost)));
+        PSA_ASSERT(psa_key_derivation_input_bytes(operation,
+                                                  PSA_KEY_DERIVATION_INPUT_SALT,
+                                                  input2,
+                                                  input2_length));
+        PSA_ASSERT(psa_key_derivation_input_key(operation,
+                                                PSA_KEY_DERIVATION_INPUT_PASSWORD,
+                                                key));
     } else {
         TEST_FAIL("Key derivation algorithm not supported");
     }
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index 2396590..d1ae15b 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -296,17 +296,6 @@
 
 #define INPUT_INTEGER 0x10000   /* Out of range of psa_key_type_t */
 
-uint64_t parse_binary_string(data_t *bin_string)
-{
-    uint64_t result = 0;
-    TEST_LE_U(bin_string->len, 8);
-    for (size_t i = 0; i < bin_string->len; i++) {
-        result = result << 8 | bin_string->x[i];
-    }
-exit:
-    return result; /* returns 0 if len > 8 */
-}
-
 /* An overapproximation of the amount of storage needed for a key of the
  * given type and with the given content. The API doesn't make it easy
  * to find a good value for the size. The current implementation doesn't