diff --git a/src/pygcode/gcodes.py b/src/pygcode/gcodes.py
index 4449d47..45c7078 100644
--- a/src/pygcode/gcodes.py
+++ b/src/pygcode/gcodes.py
@@ -341,6 +341,44 @@ class GCode(object):
         pass
 
 
+# ======================= Non Operational =======================
+# CODE          PARAMETERS      DESCRIPTION
+# N#                            Define line number (oldschool)
+# O<name>                       Define program name
+
+class GCodeDefinition(GCode):
+    pass
+
+
+class GCodeLineNumber(GCodeDefinition):
+    """N: Line Number"""
+    word_letter = 'N'
+    word_value_configurable = True
+    exec_order = 0
+
+    @classmethod
+    def word_matches(cls, w):
+        return w.letter == 'N'
+
+    @property
+    def number(self):
+        return self.word.value
+
+
+class GCodeProgramName(GCodeDefinition):
+    """O: Program Name"""
+    word_letter = 'O'
+    word_value_configurable = True
+    exec_order = 1
+
+    @classmethod
+    def word_matches(cls, w):
+        return w.letter == 'O'
+
+    @property
+    def name(self):
+        return self.word.value
+
 
 # ======================= Motion =======================
 #   (X Y Z A B C U V W apply to all motions)
@@ -360,7 +398,7 @@ class GCode(object):
 class GCodeMotion(GCode):
     param_letters = set('XYZABCUVW')
     modal_group = MODAL_GROUP_MAP['motion']
-    exec_order = 241
+    exec_order = 242
 
     def _process(self, machine):
         machine.move_to(**self.get_param_dict(letters=machine.axes))
@@ -474,6 +512,18 @@ class GCodeRigidTapping(GCodeMotion):
 class GCodeCancelCannedCycle(GCodeMotion):
     """G80: Cancel Canned Cycle"""
     word_key = Word('G', 80)
+    # Modal Group
+    #   Technically G80 belongs to the motion modal group, however it's often
+    #   expressed in the same line as another motion command.
+    #   This is alowed, but executed just prior to any other motion command
+    #       eg: G00 G80
+    #   will leave the machine in rapid motion mode
+    #   Just running G80 will leave machine with no motion mode.
+    modal_group = None
+    exec_order = 241
+
+    def _process(self, machine):
+        machine.mode.motion = None
 
 
 # ======================= Canned Cycles =======================
@@ -490,7 +540,7 @@ class GCodeCancelCannedCycle(GCodeMotion):
 class GCodeCannedCycle(GCode):
     param_letters = set('XYZUVW')
     modal_group = MODAL_GROUP_MAP['motion']
-    exec_order = 241
+    exec_order = 242
 
     def _process(self, machine):
         moveto_coords = self.get_param_dict(letters=machine.axes)
@@ -1390,7 +1440,7 @@ def word_gcode_class(word, exhaustive=False):
         build_maps()
 
     # quickly eliminate parameters
-    if (not exhaustive) and (word.letter not in 'GMFST'):
+    if (not exhaustive) and (word.letter not in 'GMFSTNO'):
         return None
 
     # by Word Map (faster)
diff --git a/src/pygcode/machine.py b/src/pygcode/machine.py
index 793abdd..286354d 100644
--- a/src/pygcode/machine.py
+++ b/src/pygcode/machine.py
@@ -410,20 +410,37 @@ class Machine(object):
 
         if not modal_params:
             return None
+
         if self.mode.motion is None:
-            raise MachineInvalidState("unable to assign modal parameters when no motion mode is set")
-        params = copy(self.mode.motion.params)  # dict
-        params.update(dict((w.letter, w) for w in modal_params))  # override retained modal parameters
-        (modal_gcodes, unasigned_words) = words2gcodes(
-            [self.mode.motion.word] + list(params.values())
-        )
+            unasigned_words = modal_params
+            # forces exception to be raised in next step
+        else:
+            params = copy(self.mode.motion.params)  # dict
+            params.update(dict((w.letter, w) for w in modal_params))  # override retained modal parameters
+            (modal_gcodes, unasigned_words) = words2gcodes(
+                [self.mode.motion.word] + list(params.values())
+            )
+
         if unasigned_words:
-            raise MachineInvalidState("modal parameters '%s' cannot be assigned when in mode: %r" % (
-                ' '.join(str(x) for x in unasigned_words), self.mode
-            ))
+            # Can't process with unknown words on the same line...
+            #   raising: MachineInvalidState
+            plausable_codes = [w for w in unasigned_words if w.letter in set('GM')]
+            if plausable_codes:
+                # words in list are probably valid, but unsupported, G-Codes
+                # raise exception with a more helpfull message
+                raise MachineInvalidState("unsupported gcode(s): '%s' (machine mode: %r)" % (
+                    ' '.join(str(x) for x in unasigned_words), self.mode
+                ))
+            else:
+                # words don't look like gcodes, assuming they're misplaced motion parameters
+                raise MachineInvalidState("modal parameters '%s' cannot be assigned when in mode: %r" % (
+                    ' '.join(str(x) for x in unasigned_words), self.mode
+                ))
+
         if modal_gcodes:
             assert len(modal_gcodes) == 1, "more than 1 modal code found"
             return modal_gcodes[0]
+
         return None
 
     def block_modal_gcodes(self, block):
diff --git a/src/pygcode/words.py b/src/pygcode/words.py
index 25d9197..c3dc5ed 100644
--- a/src/pygcode/words.py
+++ b/src/pygcode/words.py
@@ -4,10 +4,10 @@ import six
 
 from .exceptions import GCodeBlockFormatError, GCodeWordStrError
 
-REGEX_FLOAT = re.compile(r'^-?(\d+\.?\d*|\.\d+)') # testcase: ..tests.test_words.WordValueMatchTests.test_float
-REGEX_INT = re.compile(r'^-?\d+')
-REGEX_POSITIVEINT = re.compile(r'^\d+')
-REGEX_CODE = re.compile(r'^\d+(\.\d)?') # similar
+REGEX_FLOAT = re.compile(r'^\s*-?(\d+\.?\d*|\.\d+)') # testcase: ..tests.test_words.WordValueMatchTests.test_float
+REGEX_INT = re.compile(r'^\s*-?\d+')
+REGEX_POSITIVEINT = re.compile(r'^\s*\d+')
+REGEX_CODE = re.compile(r'^\s*\d+(\.\d)?') # float, but can't be negative
 
 # Value cleaning functions
 def _clean_codestr(value):
diff --git a/tests/test-files/Chucks Deer (V-Carve) {3}.tap b/tests/test-files/Chucks Deer (V-Carve) {3}.tap
index 124d4ec..5ced119 100644
--- a/tests/test-files/Chucks Deer (V-Carve) {3}.tap	
+++ b/tests/test-files/Chucks Deer (V-Carve) {3}.tap	
@@ -1,6 +1,6 @@
 ( CHUCKS DEER{3} 7 X 5 )
 N100G00G20G17G90G40G49G80
-N110G70G91.1
+N110G91.1
 N120T1M06
 N130(TOOL: V-BIT {90 DEG 0.5"})
 N140G00G43Z0.8H1
diff --git a/tests/test-files/Circular Pocket.tap b/tests/test-files/Circular Pocket.tap
index 7f58fe3..0f1090b 100644
--- a/tests/test-files/Circular Pocket.tap	
+++ b/tests/test-files/Circular Pocket.tap	
@@ -1,8 +1,8 @@
 (Code by Newfangled Wizard, 15/01/2017)
 (Version 2.86)
 (Program Posted for Aluminum )
-G0 G49 G40.1 G17
-G80 G50 G90 G98  
+G0 G49 G17
+G80 G90 G98  
 G21 (mm)
 (***** Circular Pocket *****)
 (Xcen=0 Ycen=0 Dia=10)
@@ -40,4 +40,4 @@ Y-1.5 X1.5 R1.5
 G00 Z2
 M5 M9
 M30
-%
\ No newline at end of file
+%
diff --git a/tests/test-files/Colt.tap b/tests/test-files/Colt.tap
index f624bd9..09ca86d 100644
--- a/tests/test-files/Colt.tap
+++ b/tests/test-files/Colt.tap
@@ -1,6 +1,6 @@
 ( Colt )
 N100G00G21G17G90G40G49G80
-N110G71G91.1
+N110G91.1
 N120T1M06
 N130(ENGRAVING - 20 DEG TIP 0.1)
 N140G00G43Z6H1
diff --git a/tests/test-files/Cross2.tap b/tests/test-files/Cross2.tap
index 52d862b..96c3642 100644
--- a/tests/test-files/Cross2.tap
+++ b/tests/test-files/Cross2.tap
@@ -5,7 +5,7 @@
 ( T1 = End Mill 4 mm )
 ()
 N100G00G21G17G90G40G49G80
-N110G71G91.1
+N110G91.1
 N120T1M06
 N130
 N140G00G43Z6.001H1
diff --git a/tests/test-files/DB25.tap b/tests/test-files/DB25.tap
index aecac91..fade58b 100644
--- a/tests/test-files/DB25.tap
+++ b/tests/test-files/DB25.tap
@@ -1,95 +1,95 @@
 (Code by Newfangled Wizard, 15/01/2017)
 (Version 2.86)
 (Program Posted for Aluminum )
-G0 G49 G40.1 G17
-G80 G50 G90 G98  
+G0 G49 G17
+G80 G90 G98
 G21 (mm)
 (****DB 25 Pin****)
 M6 T7(TOOL DIA. 3)
 G43 H7
 M03 S4000
 M7 (Mist On)
-G0  X18.6665 Y-3.1674 
-X18.6665 Y-3.1674 Z2 
-G1 X18.6665 Y-3.1674 Z-1 F39.6 
-G41  P1.5 X20.4013 Y-3.9116 F79.2 
-G3  X21.0007 Y-2.3038 R2.46126 
-G1 X21.0007 Y-1.6002 
-X23.3959 Y-1.6002 
-G3  X24.9961 Y0 R1.6002 
-X23.3959 Y1.6002 R1.6002 
-G1 X21.0007 Y1.6002 
-X21.0007 Y2.3241 
-G3  X17.8257 Y5.4991 R3.175 
-G1 X-17.8257 Y5.4991 
-G3  X-21.0007 Y2.3241 R3.175 
-G1 X-21.0007 Y1.6002 
-X-23.3959 Y1.6002 
-G3  X-24.9961 Y0 R1.6002 
-X-23.3959 Y-1.6002 R1.6002 
-G1 X-21.0007 Y-1.6002 
-X-21.0007 Y-2.3241 
-G3  X-17.8257 Y-5.4991 R3.175 
-G1 X17.8257 Y-5.4991 
-G3  X21.0007 Y-2.3241 R3.175 
-G1 X21.0007 Y-1.6002 
-G3  X21.8491 Y-0.7772 R1.69672 
-G1  G40 X20.4241 Y-0.0178 
-G0  X20.4241 Y-0.0178 Z2 
-G0  X18.6665 Y-3.1674 
-X18.6665 Y-3.1674 Z2 
-G1 X18.6665 Y-3.1674 Z-2 F39.6 
-G41  P1.5 X20.4013 Y-3.9116 F79.2 
-G3  X21.0007 Y-2.3038 R2.46126 
-G1 X21.0007 Y-1.6002 
-X23.3959 Y-1.6002 
-G3  X24.9961 Y0 R1.6002 
-X23.3959 Y1.6002 R1.6002 
-G1 X21.0007 Y1.6002 
-X21.0007 Y2.3241 
-G3  X17.8257 Y5.4991 R3.175 
-G1 X-17.8257 Y5.4991 
-G3  X-21.0007 Y2.3241 R3.175 
-G1 X-21.0007 Y1.6002 
-X-23.3959 Y1.6002 
-G3  X-24.9961 Y0 R1.6002 
-X-23.3959 Y-1.6002 R1.6002 
-G1 X-21.0007 Y-1.6002 
-X-21.0007 Y-2.3241 
-G3  X-17.8257 Y-5.4991 R3.175 
-G1 X17.8257 Y-5.4991 
-G3  X21.0007 Y-2.3241 R3.175 
-G1 X21.0007 Y-1.6002 
-G3  X21.8491 Y-0.7772 R1.69672 
-G1  G40 X20.4241 Y-0.0178 
-G0  X20.4241 Y-0.0178 Z2 
-G0  X18.6665 Y-3.1674 
-X18.6665 Y-3.1674 Z2 
-G1 X18.6665 Y-3.1674 Z-3 F39.6 
-G41  P1.5 X20.4013 Y-3.9116 F79.2 
-G3  X21.0007 Y-2.3038 R2.46126 
-G1 X21.0007 Y-1.6002 
-X23.3959 Y-1.6002 
-G3  X24.9961 Y0 R1.6002 
-X23.3959 Y1.6002 R1.6002 
-G1 X21.0007 Y1.6002 
-X21.0007 Y2.3241 
-G3  X17.8257 Y5.4991 R3.175 
-G1 X-17.8257 Y5.4991 
-G3  X-21.0007 Y2.3241 R3.175 
-G1 X-21.0007 Y1.6002 
-X-23.3959 Y1.6002 
-G3  X-24.9961 Y0 R1.6002 
-X-23.3959 Y-1.6002 R1.6002 
-G1 X-21.0007 Y-1.6002 
-X-21.0007 Y-2.3241 
-G3  X-17.8257 Y-5.4991 R3.175 
-G1 X17.8257 Y-5.4991 
-G3  X21.0007 Y-2.3241 R3.175 
-G1 X21.0007 Y-1.6002 
-G3  X21.8491 Y-0.7772 R1.69672 
-G1  G40 X20.4241 Y-0.0178 
-G0  X20.4241 Y-0.0178 Z2 
+G0  X18.6665 Y-3.1674
+X18.6665 Y-3.1674 Z2
+G1 X18.6665 Y-3.1674 Z-1 F39.6
+G41  D1.5 X20.4013 Y-3.9116 F79.2
+G3  X21.0007 Y-2.3038 R2.46126
+G1 X21.0007 Y-1.6002
+X23.3959 Y-1.6002
+G3  X24.9961 Y0 R1.6002
+X23.3959 Y1.6002 R1.6002
+G1 X21.0007 Y1.6002
+X21.0007 Y2.3241
+G3  X17.8257 Y5.4991 R3.175
+G1 X-17.8257 Y5.4991
+G3  X-21.0007 Y2.3241 R3.175
+G1 X-21.0007 Y1.6002
+X-23.3959 Y1.6002
+G3  X-24.9961 Y0 R1.6002
+X-23.3959 Y-1.6002 R1.6002
+G1 X-21.0007 Y-1.6002
+X-21.0007 Y-2.3241
+G3  X-17.8257 Y-5.4991 R3.175
+G1 X17.8257 Y-5.4991
+G3  X21.0007 Y-2.3241 R3.175
+G1 X21.0007 Y-1.6002
+G3  X21.8491 Y-0.7772 R1.69672
+G1  G40 X20.4241 Y-0.0178
+G0  X20.4241 Y-0.0178 Z2
+G0  X18.6665 Y-3.1674
+X18.6665 Y-3.1674 Z2
+G1 X18.6665 Y-3.1674 Z-2 F39.6
+G41  D1.5 X20.4013 Y-3.9116 F79.2
+G3  X21.0007 Y-2.3038 R2.46126
+G1 X21.0007 Y-1.6002
+X23.3959 Y-1.6002
+G3  X24.9961 Y0 R1.6002
+X23.3959 Y1.6002 R1.6002
+G1 X21.0007 Y1.6002
+X21.0007 Y2.3241
+G3  X17.8257 Y5.4991 R3.175
+G1 X-17.8257 Y5.4991
+G3  X-21.0007 Y2.3241 R3.175
+G1 X-21.0007 Y1.6002
+X-23.3959 Y1.6002
+G3  X-24.9961 Y0 R1.6002
+X-23.3959 Y-1.6002 R1.6002
+G1 X-21.0007 Y-1.6002
+X-21.0007 Y-2.3241
+G3  X-17.8257 Y-5.4991 R3.175
+G1 X17.8257 Y-5.4991
+G3  X21.0007 Y-2.3241 R3.175
+G1 X21.0007 Y-1.6002
+G3  X21.8491 Y-0.7772 R1.69672
+G1  G40 X20.4241 Y-0.0178
+G0  X20.4241 Y-0.0178 Z2
+G0  X18.6665 Y-3.1674
+X18.6665 Y-3.1674 Z2
+G1 X18.6665 Y-3.1674 Z-3 F39.6
+G41  D1.5 X20.4013 Y-3.9116 F79.2
+G3  X21.0007 Y-2.3038 R2.46126
+G1 X21.0007 Y-1.6002
+X23.3959 Y-1.6002
+G3  X24.9961 Y0 R1.6002
+X23.3959 Y1.6002 R1.6002
+G1 X21.0007 Y1.6002
+X21.0007 Y2.3241
+G3  X17.8257 Y5.4991 R3.175
+G1 X-17.8257 Y5.4991
+G3  X-21.0007 Y2.3241 R3.175
+G1 X-21.0007 Y1.6002
+X-23.3959 Y1.6002
+G3  X-24.9961 Y0 R1.6002
+X-23.3959 Y-1.6002 R1.6002
+G1 X-21.0007 Y-1.6002
+X-21.0007 Y-2.3241
+G3  X-17.8257 Y-5.4991 R3.175
+G1 X17.8257 Y-5.4991
+G3  X21.0007 Y-2.3241 R3.175
+G1 X21.0007 Y-1.6002
+G3  X21.8491 Y-0.7772 R1.69672
+G1  G40 X20.4241 Y-0.0178
+G0  X20.4241 Y-0.0178 Z2
 M5 M9
 M30
 %
diff --git a/tests/test-files/Disc3.tap b/tests/test-files/Disc3.tap
index 70aaa94..0ea1723 100644
--- a/tests/test-files/Disc3.tap
+++ b/tests/test-files/Disc3.tap
@@ -1,6 +1,6 @@
 (Tweakie.CNC)
 G00G21G17G90G40G49G80
-G71G91.1
+G91.1
 T1M06
 G00G43Z10H1
 S12000M03
diff --git a/tests/test-files/Horse.tap b/tests/test-files/Horse.tap
index 9bd7143..785fb6f 100644
--- a/tests/test-files/Horse.tap
+++ b/tests/test-files/Horse.tap
@@ -1,6 +1,6 @@
 ( Horse )
 N100G00G21G17G90G40G49G80
-N110G71G91.1
+N110G91.1
 N120T1M06
 N130(ENGRAVING - 20 DEG TIP 0.1)
 N140G00G43Z6H1
diff --git a/tests/test-files/Horse2.tap b/tests/test-files/Horse2.tap
index aeb7db2..e84485e 100644
--- a/tests/test-files/Horse2.tap
+++ b/tests/test-files/Horse2.tap
@@ -1,6 +1,6 @@
 ( Horse2 )
 N100G00G21G17G90G40G49G80
-N110G71G91.1
+N110G91.1
 N120T1M06
 N130(ENGRAVING - 20 DEG TIP 0.1)
 N140G00G43Z6H1
diff --git a/tests/test-files/Mach3 write.tap b/tests/test-files/Mach3 write.tap
index ab1b8b4..4c8f71b 100644
--- a/tests/test-files/Mach3 write.tap	
+++ b/tests/test-files/Mach3 write.tap	
@@ -1,4 +1,4 @@
-G00 G49 G40  G17 G80 G50 G90 G21
+G00 G49 G40  G17 G80 G90 G21
 M04 S12000
 G90 G90.1
 G00 Z6
@@ -72,4 +72,4 @@ G00 Z6
 G00 X0 Y0
 M05
 M30
-%
\ No newline at end of file
+%
diff --git a/tests/test-files/Mach4 write.tap b/tests/test-files/Mach4 write.tap
index 6db9f46..c3a193f 100644
--- a/tests/test-files/Mach4 write.tap	
+++ b/tests/test-files/Mach4 write.tap	
@@ -1,4 +1,4 @@
-G49 G40  G17 G80 G50 G90 G21
+G49 G40  G17 G80 G90 G21
 M04 S12000
 G90 G90.1
 G00 Z6
@@ -65,4 +65,4 @@ G00 Z6
 G00 X0 Y0
 M05
 M30
-%
\ No newline at end of file
+%
diff --git a/tests/test-files/Skull2.tap b/tests/test-files/Skull2.tap
index 1f9cc6e..3ad15cf 100644
--- a/tests/test-files/Skull2.tap
+++ b/tests/test-files/Skull2.tap
@@ -3,7 +3,7 @@
 ( X= 89.500, Y= 120.000 )
 ( TOOL=ENGRAVE {20' 0.02" TIP DIA} )
 N100G00G20G17G90G40G49G80
-N110G71G91.1
+N110G91.1
 N120T1M06
 N130
 N140G00G43Z0.4H1
diff --git a/tests/test-files/Snow White.tap b/tests/test-files/Snow White.tap
index 2757671..2db4236 100644
--- a/tests/test-files/Snow White.tap	
+++ b/tests/test-files/Snow White.tap	
@@ -1,6 +1,6 @@
 ( Snow White )
 N100G20G17G90G40G49G80
-N110G70G91.1
+N110G91.1
 N120T1M06
 N140G00G43Z0.5H1
 N150S12000M03
diff --git a/tests/test-files/Star Trek.tap b/tests/test-files/Star Trek.tap
index 02e98a3..62bb8de 100644
--- a/tests/test-files/Star Trek.tap	
+++ b/tests/test-files/Star Trek.tap	
@@ -1,6 +1,6 @@
 (Tweakie.CNC)
 G00G21G17G90G40G49G80
-G71G91.1
+G91.1
 T1M06
 S12000M03
 G94 M63P1 F1016.0
diff --git a/tests/test-files/Trispokedovetiles(laser).tap b/tests/test-files/Trispokedovetiles(laser).tap
index b9ca8d9..88be0ea 100644
--- a/tests/test-files/Trispokedovetiles(laser).tap
+++ b/tests/test-files/Trispokedovetiles(laser).tap
@@ -5,30 +5,30 @@ G90.1 (set absolute distance mode for arc centers)
 G17   (set active plane to XY)
 G21   (set units to mm)
 F600  (set feed-rate)
-M10 P1 (turns laser OFF)
+ (turns laser OFF)
 G0 X 65.8393 Y 49.0906
-M11 P1 (turns laser ON)
+ (turns laser ON)
 G3 Y 61.7398 I 65.8393 J 55.4203
 G3 Y 49.0906 I 65.8393 J 55.4101
-M10 P1 
+
 G0 X 93.3399 Y 36.7792
-M11 P1 
+
 G3 Y 42.2783 I 93.3399 J 39.5300
 G3 Y 36.7792 I 93.3399 J 39.5300
-M10 P1 
+
 G0 X 38.3388
-M11 P1 
+ 
 G3 Y 42.2783 I 38.3388 J 39.5300
 G3 Y 36.7792 I 38.3388 J 39.5300
-M10 P1 
+
 G0 X 65.8393 Y 84.4093
-M11 P1 
+
 G3 Y 89.9084 I 65.8393 J 87.1601
 G3 Y 84.4093 I 65.8393 J 87.1601
-M10 P1 
+
 G0 X 93.3399 Y 103.0402
-M11 P1 
-G1 X 86.9010 
+
+G1 X 86.9010
 G3 X 82.5094 Y 98.3285 I 86.9010 J 98.6384
 G3 X 111.3409 Y 48.3895 I 148.3411 J 103.0402
 G3 X 117.6198 Y 49.8297 I 113.8098 J 52.0294
@@ -58,7 +58,7 @@ G2 X 37.0103 Y 114.7801 I 38.9306 J 110.8202
 G2 X 94.6709 I 65.8393 J 55.4101
 G2 X 96.5606 Y 108.6206 I 92.7506 J 110.8202
 G1 X 93.3399 Y 103.0402
-M10 P1 
+
 G0 X 0.0000 Y 0.0000
 M30
 %
diff --git a/tests/test-files/plug6a.tap b/tests/test-files/plug6a.tap
index a67edb2..5343046 100644
--- a/tests/test-files/plug6a.tap
+++ b/tests/test-files/plug6a.tap
@@ -1,54 +1,54 @@
 G00G21G17G90G40G49G80
-G71G91.1
+G91.1
 
 S12000M03
-G94 M10P1 F600.0
+G94  F600.0
 X0.000Y0.000
-G00X76.918Y-10.288M10P1
-G1X76.918Y-10.288M11P1
+G00X76.918Y-10.288
+G1X76.918Y-10.288
 G1X83.317Y-10.288
 G1X83.317Y-14.187
 G1X76.918Y-14.187
 G1X76.918Y-10.288
-G00X76.918Y-10.288M10P1
+G00X76.918Y-10.288
 G00X98.918Y-10.288
-G1X98.918Y-10.288M11P1
+G1X98.918Y-10.288
 G1X105.317Y-10.288
 G1X105.317Y-14.187
 G1X98.918Y-14.187
 G1X98.918Y-10.288
-G00X98.918Y-10.288M10P1
+G00X98.918Y-10.288
 G00X93.022Y5.812
-G1X93.022Y5.812M11P1
+G1X93.022Y5.812
 G1X89.122Y5.812
 G1X89.122Y13.712
 G1X93.022Y13.712
 G1X93.022Y5.812
-G00X93.022Y5.812M10P1
+G00X93.022Y5.812
 G00X-75.607Y-10.288
-G1X-75.607Y-10.288M11P1
+G1X-75.607Y-10.288
 G1X-75.607Y-14.187
 G1X-82.006Y-14.187
 G1X-82.006Y-10.288
 G1X-75.607Y-10.288
-G00X-75.607Y-10.288M10P1
+G00X-75.607Y-10.288
 G00X-97.607Y-10.288
-G1X-97.607Y-10.288M11P1
+G1X-97.607Y-10.288
 G1X-97.607Y-14.187
 G1X-104.006Y-14.187
 G1X-104.006Y-10.288
 G1X-97.607Y-10.288
-G00X-97.607Y-10.288M10P1
+G00X-97.607Y-10.288
 G00X-91.836Y5.812
-G1X-91.836Y5.812M11P1
+G1X-91.836Y5.812
 G1X-91.836Y13.712
 G1X-87.937Y13.712
 G1X-87.937Y5.812
 G1X-91.836Y5.812
-G00X-91.836Y5.812M10P1
+G00X-91.836Y5.812
 
 G00X-15.556Y7.900
-G1X-15.556Y7.900M11P1
+G1X-15.556Y7.900
 G2X-36.650Y9.539I13.488J310.094
 G2X-49.156Y11.364I21.153J188.675
 G2X-59.846Y13.733I24.394J135.416
@@ -122,8 +122,8 @@ G2X54.729Y12.209I-26.464J81.059
 G2X39.610Y9.752I-40.016J198.475
 G2X21.814Y8.147I-32.998J266.303
 G2X-15.556Y7.900I-21.148J372.705
-G00X-15.556Y7.900M10P1
-M10P1
+G00X-15.556Y7.900
+
 G00X0.000Y0.000
 M09
 M30
diff --git a/tests/test-files/unsupported/README.md b/tests/test-files/unsupported/README.md
index 98db6ad..04a561f 100644
--- a/tests/test-files/unsupported/README.md
+++ b/tests/test-files/unsupported/README.md
@@ -6,7 +6,6 @@ We can however still deal with these, workarounds shown below
 
 ## Unsupported GCodes
 
-
 When attempting to process unsupported gcode(s) via a `Machine` the following error (or similar) will be raised
 
     MachineInvalidState: unsupported gcode(s): 'P1 M10' (machine mode: <Mode: G00 G17 G90 G90.1 G94 G21 G40 G49 G54 G61 G97 M05 M09 F600 S0 T0>)
diff --git a/tests/test_gcodes.py b/tests/test_gcodes.py
index 3da46a8..277ead6 100644
--- a/tests/test_gcodes.py
+++ b/tests/test_gcodes.py
@@ -38,7 +38,7 @@ class GCodeModalGroupTests(unittest.TestCase):
         table_rows += '''
         Non-modal codes (Group 0)               G4,G10,G28,G30,G53,G92,G92.1,G92.2,G92.3
         Motion (Group 1)                        G0,G1,G2,G3,G33,G38.2,G38.3,G38.4
-        Motion (Group 1)                        G38.5,G73,G76,G80,G81,G82,G83,G85,G89
+        Motion (Group 1)                        G38.5,G73,G76,G81,G82,G83,G85,G89
         Plane selection (Group 2)               G17, G18, G19, G17.1, G18.1, G19.1
         Distance Mode (Group 3)                 G90, G91
         Arc IJK Distance Mode (Group 4)         G90.1, G91.1
diff --git a/tests/test_words.py b/tests/test_words.py
index b5482c1..5c98a2c 100644
--- a/tests/test_words.py
+++ b/tests/test_words.py
@@ -54,10 +54,11 @@ class WordValueMatchTests(unittest.TestCase):
                 ('1.2', '1.2'), ('1', '1'), ('200', '200'), ('0092', '0092'),
                 ('1.', '1.'), ('.2', '.2'), ('-1.234', '-1.234'),
                 ('-1.', '-1.'), ('-.289', '-.289'),
+                (' 1.2', ' 1.2'), # leading whitespace
                 # error cases (only detectable in gcode context)
                 ('1.2e3', '1.2'),
             ],
-            negative_list=['.', ' 1.2']
+            negative_list=['.']
         )
 
     def test_code(self):
@@ -67,8 +68,9 @@ class WordValueMatchTests(unittest.TestCase):
                 ('1.2', '1.2'), ('1', '1'), ('10', '10'),
                 ('02', '02'), ('02.3', '02.3'),
                 ('1.', '1'), ('03 ', '03'),
+                (' 2', ' 2'), # leading whitespace
                 # error cases (only detectable in gcode context)
                 ('30.12', '30.1'),
             ],
-            negative_list=['.2', '.', ' 2']
+            negative_list=['.2', '.']
         )