diff --git a/tools/test/config_test/test12/mbed_app.json b/tools/test/config_test/test12/mbed_app.json
index 8caddebb07f..a1cc0da241d 100644
--- a/tools/test/config_test/test12/mbed_app.json
+++ b/tools/test/config_test/test12/mbed_app.json
@@ -1,6 +1,14 @@
 {
+    "custom_targets": {
+        "test_target": {
+            "core": "Cortex-M0",
+            "extra_labels": [],
+            "features": [],
+            "default_build": "standard"
+        }
+    },
     "target_overrides": {
-        "K64F": {
+        "test_target": {
             "lib1.p1": "v_p1_lib1_app",
             "lib2.p1": "v_p1_lib2_app"
         }
diff --git a/tools/test/config_test/test12/test_data.py b/tools/test/config_test/test12/test_data.py
index cd18cdd461b..d2489dc7732 100644
--- a/tools/test/config_test/test12/test_data.py
+++ b/tools/test/config_test/test12/test_data.py
@@ -3,7 +3,7 @@
 # named p1 from both lib1 and lib2.
 
 expected_results = {
-   "K64F": {
+   "test_target": {
         "desc": "app without its own parameters overrides parameters in other libs",
         "lib1.p1": "v_p1_lib1_app",
         "lib1.p2": "v_p2_lib1",
diff --git a/tools/test/config_test/test16/mbed_app.json b/tools/test/config_test/test16/mbed_app.json
index f50a39bfd1d..88548afbcc7 100644
--- a/tools/test/config_test/test16/mbed_app.json
+++ b/tools/test/config_test/test16/mbed_app.json
@@ -1,3 +1,11 @@
 {
+    "custom_targets": {
+        "test_target": {
+            "core": "Cortex-M0",
+            "extra_labels": [],
+            "features": [],
+            "default_build": "standard"
+        }
+    },
     "macros": ["APP1=10", "APP2", "LIB2_1=5"]
 }
diff --git a/tools/test/config_test/test16/test_data.py b/tools/test/config_test/test16/test_data.py
index 0032c138ae3..5a106b742b9 100644
--- a/tools/test/config_test/test16/test_data.py
+++ b/tools/test/config_test/test16/test_data.py
@@ -5,7 +5,7 @@
 # no error should be raised
 
 expected_results = {
-    "K64F": {
+    "test_target": {
         "desc": "test macro definitions",
         "expected_macros": ["APP1=10", "APP2", "LIB1_1=1","LIB1_2", "LIB2_1=5"]
     }
diff --git a/tools/test/config_test/test21/mbed_app.json b/tools/test/config_test/test21/mbed_app.json
index d1a874a23d8..1a37e3fc4a0 100644
--- a/tools/test/config_test/test21/mbed_app.json
+++ b/tools/test/config_test/test21/mbed_app.json
@@ -1,4 +1,12 @@
 {
+    "custom_targets": {
+        "test_target": {
+            "core": "Cortex-M0",
+            "extra_labels": [],
+            "features": [],
+            "default_build": "standard"
+        }
+    },
     "target_overrides": {
         "*": {
             "target.features": ["IPV4", "IPV6"]
diff --git a/tools/test/config_test/test21/test_data.py b/tools/test/config_test/test21/test_data.py
index ccacf26faff..ca0a48907cc 100644
--- a/tools/test/config_test/test21/test_data.py
+++ b/tools/test/config_test/test21/test_data.py
@@ -1,7 +1,7 @@
 # Testing basic features
 
 expected_results = {
-    "K64F": {
+    "test_target": {
         "desc": "test basic features",
         "expected_features": ["IPV4", "IPV6"]
     }
diff --git a/tools/test/config_test/test22/mbed_app.json b/tools/test/config_test/test22/mbed_app.json
index a070a2d5565..694ec4c73ef 100644
--- a/tools/test/config_test/test22/mbed_app.json
+++ b/tools/test/config_test/test22/mbed_app.json
@@ -1,7 +1,16 @@
 {
+    "custom_targets": {
+        "test_target": {
+            "core": "Cortex-M0",
+            "extra_labels": [],
+            "features": [],
+            "default_build": "standard"
+        }
+    },
     "target_overrides": {
         "*": {
             "target.features_add": ["IPV6"]
         }
     }
 }
+
diff --git a/tools/test/config_test/test22/test_data.py b/tools/test/config_test/test22/test_data.py
index 6fcd5089618..7610f4107cd 100644
--- a/tools/test/config_test/test22/test_data.py
+++ b/tools/test/config_test/test22/test_data.py
@@ -1,7 +1,7 @@
 # Testing when adding two features
 
 expected_results = {
-    "K64F": {
+    "test_target": {
         "desc": "test composing features",
         "expected_features": ["IPV4", "IPV6"]
     }
diff --git a/tools/test/config_test/test24/mbed_app.json b/tools/test/config_test/test24/mbed_app.json
index 56af1f52840..290cddfc2f3 100644
--- a/tools/test/config_test/test24/mbed_app.json
+++ b/tools/test/config_test/test24/mbed_app.json
@@ -1,4 +1,12 @@
 {
+    "custom_targets": {
+        "test_target": {
+            "core": "Cortex-M0",
+            "extra_labels": [],
+            "features": [],
+            "default_build": "standard"
+        }
+    },
     "target_overrides": {
         "*": {
             "target.features_add": ["IPV4"]
diff --git a/tools/test/config_test/test24/test_data.py b/tools/test/config_test/test24/test_data.py
index 97ebe5bc7c8..00681ed475c 100644
--- a/tools/test/config_test/test24/test_data.py
+++ b/tools/test/config_test/test24/test_data.py
@@ -1,7 +1,7 @@
 # Testing if features can enable other features
 
 expected_results = {
-    "K64F": {
+    "test_target": {
         "desc": "test recursive features",
         "expected_features": ["IPV4", "IPV6", "UVISOR"]
     }
diff --git a/tools/test/config_test/test26/mbed_app.json b/tools/test/config_test/test26/mbed_app.json
index 1d926c1abec..4431fa0db0b 100644
--- a/tools/test/config_test/test26/mbed_app.json
+++ b/tools/test/config_test/test26/mbed_app.json
@@ -1,4 +1,12 @@
 {
+    "custom_targets": {
+        "test_target": {
+            "core": "Cortex-M0",
+            "extra_labels": [],
+            "features": [],
+            "default_build": "standard"
+        }
+    },
     "target_overrides": {
         "*": {
             "target.features_add": ["IPV4"],
diff --git a/tools/test/config_test/test26/test_data.py b/tools/test/config_test/test26/test_data.py
index 08300ab45ae..2d16a8bf347 100644
--- a/tools/test/config_test/test26/test_data.py
+++ b/tools/test/config_test/test26/test_data.py
@@ -1,7 +1,7 @@
 # Testing if config settings work in recursive features
 
 expected_results = {
-    "K64F": {
+    "test_target": {
         "desc": "test recursive feature configurations",
         "lib2.test": "GOOD"
     }