diff --git a/targets/TARGET_Freescale/USBPhy_Kinetis.cpp b/targets/TARGET_Freescale/USBPhy_Kinetis.cpp
index 4332ce3af6..61d08c3d3c 100644
--- a/targets/TARGET_Freescale/USBPhy_Kinetis.cpp
+++ b/targets/TARGET_Freescale/USBPhy_Kinetis.cpp
@@ -17,8 +17,7 @@
 #if defined(DEVICE_USBDEVICE) && DEVICE_USBDEVICE && \
     (defined(TARGET_KL25Z) | defined(TARGET_KL43Z) | \
      defined(TARGET_KL46Z) | \
-     defined(TARGET_K64F) | defined(TARGET_K22F) | defined(TARGET_K82F) | \
-     defined(TARGET_TEENSY3_1))
+     defined(TARGET_K64F) | defined(TARGET_K22F) | defined(TARGET_K82F))
 
 #if defined(TARGET_KSDK2_MCUS)
 #include "fsl_common.h"
diff --git a/targets/TARGET_Freescale/mbed_rtx.h b/targets/TARGET_Freescale/mbed_rtx.h
index 1b0b876c29..7e54aac663 100644
--- a/targets/TARGET_Freescale/mbed_rtx.h
+++ b/targets/TARGET_Freescale/mbed_rtx.h
@@ -19,13 +19,7 @@
 
 #include <stdint.h>
 
-#if defined(TARGET_TEENSY3_1)
-
-#ifndef INITIAL_SP
-#define INITIAL_SP              (0x20008000UL)
-#endif
-
-#elif defined(TARGET_MCU_K22F)
+#if defined(TARGET_MCU_K22F)
 
 #ifndef INITIAL_SP
 #define INITIAL_SP              (0x20010000UL)
diff --git a/targets/targets.json b/targets/targets.json
index 554a2ce4d6..73a574e5a1 100644
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -720,55 +720,6 @@
         "device_name": "MKL46Z256xxx4",
         "bootloader_supported": true
     },
-    "TEENSY3_1": {
-        "inherits": [
-            "Target"
-        ],
-        "core": "Cortex-M4",
-        "extra_labels": [
-            "Freescale",
-            "K20XX",
-            "K20DX256"
-        ],
-        "OUTPUT_EXT": "hex",
-        "is_disk_virtual": true,
-        "supported_toolchains": [
-            "GCC_ARM",
-            "ARM"
-        ],
-        "post_binary_hook": {
-            "function": "TEENSY3_1Code.binary_hook",
-            "toolchains": [
-                "ARM_STD",
-                "ARM_MICRO",
-                "GCC_ARM"
-            ]
-        },
-        "detect_code": [
-            "0230"
-        ],
-        "device_has": [
-            "ANALOGIN",
-            "ANALOGOUT",
-            "I2C",
-            "I2CSLAVE",
-            "INTERRUPTIN",
-            "PORTIN",
-            "PORTINOUT",
-            "PORTOUT",
-            "PWMOUT",
-            "SEMIHOST",
-            "SERIAL",
-            "SLEEP",
-            "SPI",
-            "SPISLAVE",
-            "STDIO_MESSAGES"
-        ],
-        "release_versions": [
-            "2"
-        ],
-        "device_name": "MK20DX256xxx7"
-    },
     "MCU_K22F512": {
         "core": "Cortex-M4F",
         "supported_toolchains": [
diff --git a/tools/export/cmake/__init__.py b/tools/export/cmake/__init__.py
index 1b05a6f465..5163c03643 100644
--- a/tools/export/cmake/__init__.py
+++ b/tools/export/cmake/__init__.py
@@ -43,7 +43,6 @@ class CMake(Exporter):
 
     POST_BINARY_WHITELIST = set([
         "MCU_NRF51Code.binary_hook",
-        "TEENSY3_1Code.binary_hook",
         "LPCTargetCode.lpc_patch",
         "PSOC6Code.complete"
     ])
diff --git a/tools/export/embitz/__init__.py b/tools/export/embitz/__init__.py
index 7b2a047b00..bcd782604d 100644
--- a/tools/export/embitz/__init__.py
+++ b/tools/export/embitz/__init__.py
@@ -22,7 +22,6 @@ from tools.export.exporters import Exporter, apply_supported_whitelist
 
 
 POST_BINARY_WHITELIST = set([
-    "TEENSY3_1Code.binary_hook",
     "LPCTargetCode.lpc_patch"
 ])
 
diff --git a/tools/export/gnuarmeclipse/__init__.py b/tools/export/gnuarmeclipse/__init__.py
index 2b9925f139..380e43f076 100644
--- a/tools/export/gnuarmeclipse/__init__.py
+++ b/tools/export/gnuarmeclipse/__init__.py
@@ -61,7 +61,6 @@ u = UID()
 
 
 POST_BINARY_WHITELIST = set([
-    "TEENSY3_1Code.binary_hook",
     "MCU_NRF51Code.binary_hook",
     "LPCTargetCode.lpc_patch",
     "PSOC6Code.complete"
diff --git a/tools/export/makefile/__init__.py b/tools/export/makefile/__init__.py
index 10f8b0f775..07cae6c455 100644
--- a/tools/export/makefile/__init__.py
+++ b/tools/export/makefile/__init__.py
@@ -62,7 +62,6 @@ class Makefile(Exporter):
 
     POST_BINARY_WHITELIST = set([
         "MCU_NRF51Code.binary_hook",
-        "TEENSY3_1Code.binary_hook",
         "LPCTargetCode.lpc_patch",
         "PSOC6Code.complete"
     ])
diff --git a/tools/export/mcuxpresso/__init__.py b/tools/export/mcuxpresso/__init__.py
index bb687d7ada..278c43da18 100644
--- a/tools/export/mcuxpresso/__init__.py
+++ b/tools/export/mcuxpresso/__init__.py
@@ -43,7 +43,6 @@ from tools.build_api import prepare_toolchain
 
 
 POST_BINARY_WHITELIST = set([
-    "TEENSY3_1Code.binary_hook",
     "MCU_NRF51Code.binary_hook",
     "LPCTargetCode.lpc_patch"
 ])
diff --git a/tools/export/nb/__init__.py b/tools/export/nb/__init__.py
index f0253c5643..90c6522cfc 100644
--- a/tools/export/nb/__init__.py
+++ b/tools/export/nb/__init__.py
@@ -15,7 +15,6 @@ from tools.utils import NotSupportedException
 from tools.build_api import prepare_toolchain
 
 POST_BINARY_WHITELIST = set([
-    "TEENSY3_1Code.binary_hook",
     "MCU_NRF51Code.binary_hook",
     "LPCTargetCode.lpc_patch"
 ])
diff --git a/tools/export/uvision/__init__.py b/tools/export/uvision/__init__.py
index 60982ed4b7..02b330f64d 100644
--- a/tools/export/uvision/__init__.py
+++ b/tools/export/uvision/__init__.py
@@ -133,7 +133,6 @@ class Uvision(Exporter):
 
     POST_BINARY_WHITELIST = set([
         "MCU_NRF51Code.binary_hook",
-        "TEENSY3_1Code.binary_hook",
         "LPCTargetCode.lpc_patch",
         "MTSCode.combine_bins_mts_dragonfly",
         "NCS36510TargetCode.ncs36510_addfib",
diff --git a/tools/targets/__init__.py b/tools/targets/__init__.py
index 66e038e206..30a88fa18f 100644
--- a/tools/targets/__init__.py
+++ b/tools/targets/__init__.py
@@ -470,16 +470,6 @@ class LPCTargetCode(object):
         t_self.notify.debug("LPC Patch: %s" % os.path.split(binf)[1])
         patch(binf)
 
-class TEENSY3_1Code(object):
-    """Hooks for the TEENSY3.1"""
-    @staticmethod
-    def binary_hook(t_self, resources, elf, binf):
-        """Hook that is run after elf is generated"""
-        # This function is referenced by old versions of targets.json and
-        # should be kept for backwards compatibility.
-        pass
-
-
 class MTSCode(object):
     """Generic MTS code"""
     @staticmethod