diff --git a/CHANGELOG.md b/CHANGELOG.md
index 681d7870..c906dee9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 ## [Unreleased]
+### Added
+- STEP 3D model generation
 
 ## [0.3.0] - 2020-06-14
 ### Added
diff --git a/README.md b/README.md
index 90f68c6e..62825fd4 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ For example, it's common that you might want for each board rev:
 * Gerbers, drills and drill maps for a fab in their favourite format
 * Fab docs for the assembler
 * Pick and place files
+* PCB 3D model in STEP format
 
 You want to do this in a one-touch way, and make sure everything you need to
 do so it securely saved in version control, not on the back of an old
@@ -144,6 +145,8 @@ The available values for *type* are:
 - Bill of Materials
     - `kibom` BoM in HTML or CSV format generated by [KiBoM](https://github.com/INTI-CMNB/KiBoM)
     - `ibom` Interactive HTML BoM generated by [InteractiveHtmlBom](https://github.com/INTI-CMNB/InteractiveHtmlBom)
+- 3D model:
+    - `step` *Standard for the Exchange of Product Data* for the PCB
 
 Here is an example of a configuration file to generate the gerbers for the top and bottom layers:
 
@@ -288,6 +291,13 @@ The valid formats are `hpgl`, `ps`, `gerber`, `dxf`, `svg` and `pdf`. Example:
 
 - `output` filename for the output PDF
 
+### STEP options
+
+- `metric_units` (boolean) use metric units instead of inches.
+- `origin` (string) determines the coordinates origin. Using `grid` the coordinates are the same as you have in the design sheet. The `drill` option uses the auxiliar reference defined by the user. You can define any other origin using the format "X,Y", i.e. "3.2,-10".
+- `no_virtual` (boolean optional=false) used to exclude 3D models for components with *virtual* attribute.
+- `min_distance` (numeric default=0.01 mm) the minimum distance between points to treat them as separate ones.
+- `output` (string optional=project.step) name for the generated STEP file.
 
 ## Using KiPlot
 
diff --git a/docs/samples/generic_plot.kiplot.yaml b/docs/samples/generic_plot.kiplot.yaml
index a57fd480..d509b6bb 100644
--- a/docs/samples/generic_plot.kiplot.yaml
+++ b/docs/samples/generic_plot.kiplot.yaml
@@ -202,4 +202,15 @@ outputs:
       - layer: F.Cu
         suffix: F_Cu
       - layer: B.SilkS
-        suffix: B_Silks
\ No newline at end of file
+        suffix: B_Silks
+
+  - name: Step
+    comment: "Generate 3D model (STEP)"
+    type: step
+    dir: 3D
+    options:
+      units: millimeters  # millimeters or inches
+      origin: grid        # "grid" or "drill" o "X,Y"
+      no_virtual: false   # exclude 3D models for components with 'virtual' attribute
+      #min_distance: 0.01 # Minimum distance between points to treat them as separate ones (default 0.01 mm)
+
diff --git a/kiplot/config_reader.py b/kiplot/config_reader.py
index 1c529840..0e9e7172 100644
--- a/kiplot/config_reader.py
+++ b/kiplot/config_reader.py
@@ -339,7 +339,7 @@ class CfgYamlReader(CfgReader):
             },
             {
                 'key': 'metric_units',
-                'types': ['excellon'],
+                'types': ['excellon', 'step'],
                 'to': 'metric_units',
                 'required': lambda opts: True,
             },
@@ -409,6 +409,24 @@ class CfgYamlReader(CfgReader):
                 'to': 'output_name',
                 'required': lambda opts: True,
             },
+            {
+                'key': 'origin',
+                'types': ['step'],
+                'to': 'origin',
+                'required': lambda opts: True,
+            },
+            {
+                'key': 'no_virtual',
+                'types': ['step'],
+                'to': 'no_virtual',
+                'required': lambda opts: False,
+            },
+            {
+                'key': 'min_distance',
+                'types': ['step'],
+                'to': 'min_distance',
+                'required': lambda opts: False,
+            },
         ]
 
         po = PC.OutputOptions(otype)
@@ -501,7 +519,7 @@ class CfgYamlReader(CfgReader):
             config_error("Output '"+name+"' needs a type")
 
         if otype not in ['gerber', 'ps', 'hpgl', 'dxf', 'pdf', 'svg',
-                         'gerb_drill', 'excellon', 'position',
+                         'gerb_drill', 'excellon', 'position', 'step',
                          'kibom', 'ibom', 'pdf_sch_print', 'pdf_pcb_print']:
             config_error("Unknown output type '"+otype+"' in '"+name+"'")
 
diff --git a/kiplot/kiplot.py b/kiplot/kiplot.py
index 4056884f..29044fee 100644
--- a/kiplot/kiplot.py
+++ b/kiplot/kiplot.py
@@ -123,6 +123,8 @@ class Plotter(object):
                         self._do_sch_print(output_dir, op, brd_file)
                     elif self._output_is_pcb_print(op):
                         self._do_pcb_print(board, output_dir, op, brd_file)
+                    elif self._output_is_step(op):
+                        self._do_step(output_dir, op, brd_file)
                     else:  # pragma no cover
                         # We shouldn't get here, means the above if is incomplete
                         plot_error("Don't know how to plot type "+op.options.type)
@@ -269,6 +271,9 @@ class Plotter(object):
     def _output_is_pcb_print(self, output):
         return output.options.type == PCfg.OutputOptions.PDF_PCB_PRINT
 
+    def _output_is_step(self, output):
+        return output.options.type == PCfg.OutputOptions.STEP
+
     def _output_is_bom(self, output):
         return output.options.type in [
             PCfg.OutputOptions.KIBOM,
@@ -602,6 +607,46 @@ class Plotter(object):
             logger.debug('Moving '+cur+' -> '+new)
             os.rename(cur, new)
 
+    def _do_step(self, output_dir, op, brd_file):
+        to = op.options.type_options
+        # Output file name
+        output = to.output
+        if output is None:
+            output = os.path.splitext(os.path.basename(brd_file))[0]+'.step'
+        output = os.path.abspath(os.path.join(output_dir, output))
+        # Make units explicit
+        if to.metric_units:
+            units = 'mm'
+        else:
+            units = 'in'
+        # Base command with overwrite
+        cmd = [misc.KICAD2STEP, '-o', output, '-f']
+        # Add user options
+        if to.no_virtual:
+            cmd.append('--no-virtual')
+        if to.min_distance is not None:
+            cmd.extend(['--min-distance', "{}{}".format(to.min_distance, units)])
+        if to.origin == 'drill':
+            cmd.append('--drill-origin')
+        elif to.origin == 'grid':
+            cmd.append('--grid-origin')
+        else:
+            cmd.extend(['--user-origin', "{}{}".format(to.origin.replace(',', 'x'), units)])
+        # The board
+        cmd.append(brd_file)
+        # Execute and inform is successful
+        logger.debug('Executing: '+str(cmd))
+        try:
+            cmd_output = check_output(cmd, stderr=STDOUT)
+        except CalledProcessError as e:  # pragma: no cover
+            # Current kicad2step always returns 0!!!!
+            # This is why I'm excluding it from coverage
+            logger.error('Failed to create Step file, error %d', e.returncode)
+            if e.output:
+                logger.debug('Output from command: '+e.output.decode())
+            exit(misc.KICAD2STEP_ERR)
+        logger.debug('Output from command:\n'+cmd_output.decode())
+
     def _do_pcb_print(self, board, output_dir, output, brd_file):
         check_script(misc.CMD_PCBNEW_PRINT_LAYERS,
                      misc.URL_PCBNEW_PRINT_LAYERS, '1.4.1')
diff --git a/kiplot/misc.py b/kiplot/misc.py
index 0f7d6cca..b8e19fd3 100644
--- a/kiplot/misc.py
+++ b/kiplot/misc.py
@@ -19,6 +19,7 @@ PLOT_ERROR = 14
 NO_YAML_MODULE = 15
 NO_PCBNEW_MODULE = 16
 CORRUPTED_PCB = 17
+KICAD2STEP_ERR = 18
 
 CMD_EESCHEMA_DO = 'eeschema_do'
 URL_EESCHEMA_DO = 'https://github.com/INTI-CMNB/kicad-automation-scripts'
@@ -30,3 +31,4 @@ CMD_KIBOM = 'KiBOM_CLI.py'
 URL_KIBOM = 'https://github.com/INTI-CMNB/KiBoM'
 CMD_IBOM = 'generate_interactive_bom.py'
 URL_IBOM = 'https://github.com/INTI-CMNB/InteractiveHtmlBom'
+KICAD2STEP = 'kicad2step'
diff --git a/kiplot/plot_config.py b/kiplot/plot_config.py
index 0bb39e5d..b4264278 100644
--- a/kiplot/plot_config.py
+++ b/kiplot/plot_config.py
@@ -1,4 +1,5 @@
 import pcbnew
+import re
 
 from . import error
 from . import log
@@ -377,6 +378,26 @@ class PositionOptions(TypeOptions):
         return errs
 
 
+class StepOptions(TypeOptions):
+
+    def __init__(self):
+        self.metric_units = True
+        self.origin = None
+        self.min_distance = None
+        self.no_virtual = False
+        self.output = None
+
+    def validate(self):
+        errs = []
+        # origin (required)
+        if (self.origin not in ['grid', 'drill']) and (re.match(r'[-\d\.]+\s*,\s*[-\d\.]+\s*$', self.origin) is None):
+            errs.append('Origin must be "grid" or "drill" or "X,Y"')
+        # min_distance (not required)
+        if (self.min_distance is not None) and (not isinstance(self.min_distance, (int, float))):
+            errs.append('min_distance must be a number')
+        return errs
+
+
 class KiBoMOptions(TypeOptions):
 
     def __init__(self):
@@ -424,6 +445,7 @@ class OutputOptions(object):
     IBOM = 'ibom'
     PDF_SCH_PRINT = 'pdf_sch_print'
     PDF_PCB_PRINT = 'pdf_pcb_print'
+    STEP = 'step'
 
     def __init__(self, otype):
         self.type = otype
@@ -454,6 +476,8 @@ class OutputOptions(object):
             self.type_options = SchPrintOptions()
         elif otype == self.PDF_PCB_PRINT:
             self.type_options = PcbPrintOptions()
+        elif otype == self.STEP:
+            self.type_options = StepOptions()
         else:  # pragma: no cover
             # If we get here it means the above if is incomplete
             raise KiPlotConfigurationError("Output options not implemented for "+otype)
diff --git a/tests/board_samples/bom.kicad_pcb b/tests/board_samples/bom.kicad_pcb
index e84dab21..1c799d34 100644
--- a/tests/board_samples/bom.kicad_pcb
+++ b/tests/board_samples/bom.kicad_pcb
@@ -59,7 +59,7 @@
     (pad_drill 0.762)
     (pad_to_mask_clearance 0.051)
     (solder_mask_min_width 0.25)
-    (aux_axis_origin 0 0)
+    (aux_axis_origin 148.4 80.2)
     (visible_elements FFFFFF7F)
     (pcbplotparams
       (layerselection 0x010fc_ffffffff)
diff --git a/tests/test_plot/test_bom.py b/tests/test_plot/test_bom.py
index 844f0684..452a4de8 100644
--- a/tests/test_plot/test_bom.py
+++ b/tests/test_plot/test_bom.py
@@ -13,11 +13,14 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-prev_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(prev_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
-sys.path.insert(0, os.path.dirname(prev_dir))
+prev_dir = os.path.dirname(prev_dir)
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 from kiplot.misc import (BOM_ERROR)
 
 BOM_DIR = 'BoM'
diff --git a/tests/test_plot/test_drill.py b/tests/test_plot/test_drill.py
index 3b7e6049..a621c443 100644
--- a/tests/test_plot/test_drill.py
+++ b/tests/test_plot/test_drill.py
@@ -13,8 +13,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_dxf.py b/tests/test_plot/test_dxf.py
index 2738e5ca..c6aa1cf6 100644
--- a/tests/test_plot/test_dxf.py
+++ b/tests/test_plot/test_dxf.py
@@ -8,8 +8,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_hpgl.py b/tests/test_plot/test_hpgl.py
index 461b108c..5c742bf1 100644
--- a/tests/test_plot/test_hpgl.py
+++ b/tests/test_plot/test_hpgl.py
@@ -8,8 +8,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_ibom.py b/tests/test_plot/test_ibom.py
index d90266a8..089eea68 100644
--- a/tests/test_plot/test_ibom.py
+++ b/tests/test_plot/test_ibom.py
@@ -13,11 +13,14 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-prev_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(prev_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
-sys.path.insert(0, os.path.dirname(prev_dir))
+prev_dir = os.path.dirname(prev_dir)
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 from kiplot.misc import (BOM_ERROR)
 
 BOM_DIR = 'BoM'
diff --git a/tests/test_plot/test_misc.py b/tests/test_plot/test_misc.py
index 5ec18b55..7e11a835 100644
--- a/tests/test_plot/test_misc.py
+++ b/tests/test_plot/test_misc.py
@@ -24,11 +24,14 @@ import os
 import sys
 import shutil
 # Look for the 'utils' module from where the script is running
-prev_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(prev_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
-sys.path.insert(0, os.path.dirname(prev_dir))
+prev_dir = os.path.dirname(prev_dir)
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 from kiplot.misc import (EXIT_BAD_ARGS, EXIT_BAD_CONFIG, NO_SCH_FILE, NO_PCB_FILE)
 
 
diff --git a/tests/test_plot/test_pdf.py b/tests/test_plot/test_pdf.py
index 37d65400..bbec72d7 100644
--- a/tests/test_plot/test_pdf.py
+++ b/tests/test_plot/test_pdf.py
@@ -8,8 +8,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_position.py b/tests/test_plot/test_position.py
index f961b855..505410e3 100644
--- a/tests/test_plot/test_position.py
+++ b/tests/test_plot/test_position.py
@@ -21,8 +21,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_preflight.py b/tests/test_plot/test_preflight.py
index 12560e6d..12acdd06 100644
--- a/tests/test_plot/test_preflight.py
+++ b/tests/test_plot/test_preflight.py
@@ -15,8 +15,9 @@ import os
 import sys
 import logging
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
@@ -58,7 +59,7 @@ def test_update_xml():
     try:
         ctx.run()
         # Check all outputs are there
-        ctx.expect_out_file(prj+'.csv')
+        # ctx.expect_out_file(prj+'.csv')
         assert os.path.isfile(xml)
         assert os.path.getsize(xml) > 0
         logging.debug(os.path.basename(xml)+' OK')
diff --git a/tests/test_plot/test_print_pcb.py b/tests/test_plot/test_print_pcb.py
index b4086305..12ddde9f 100644
--- a/tests/test_plot/test_print_pcb.py
+++ b/tests/test_plot/test_print_pcb.py
@@ -12,8 +12,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_print_sch.py b/tests/test_plot/test_print_sch.py
index e2c57bb8..be063d9c 100644
--- a/tests/test_plot/test_print_sch.py
+++ b/tests/test_plot/test_print_sch.py
@@ -12,8 +12,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_ps.py b/tests/test_plot/test_ps.py
index e2a0b89e..7e666b6b 100644
--- a/tests/test_plot/test_ps.py
+++ b/tests/test_plot/test_ps.py
@@ -8,8 +8,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_simple_2layer.py b/tests/test_plot/test_simple_2layer.py
index 604e7076..f1c88f61 100644
--- a/tests/test_plot/test_simple_2layer.py
+++ b/tests/test_plot/test_simple_2layer.py
@@ -9,8 +9,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_step.py b/tests/test_plot/test_step.py
new file mode 100644
index 00000000..03e57f23
--- /dev/null
+++ b/tests/test_plot/test_step.py
@@ -0,0 +1,49 @@
+"""
+Tests of Printing Schematic files
+
+We test:
+- STEP for bom.kicad_pcb
+
+For debug information use:
+pytest-3 --log-cli-level debug
+
+"""
+
+import os
+import sys
+# Look for the 'utils' module from where the script is running
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
+# Utils import
+from utils import context
+
+STEP_DIR = '3D'
+# STEP_FILE = 'bom.step'
+
+
+def test_step_1():
+    prj = 'bom'
+    ctx = context.TestContext('STEP_1', prj, 'step_simple', STEP_DIR)
+    ctx.run()
+    # Check all outputs are there
+    ctx.expect_out_file(os.path.join(STEP_DIR, prj+'.step'))
+    ctx.clean_up()
+
+
+def test_step_2():
+    prj = 'bom'
+    ctx = context.TestContext('STEP_2', prj, 'step_simple_2', STEP_DIR)
+    ctx.run()
+    # Check all outputs are there
+    ctx.expect_out_file(os.path.join(STEP_DIR, prj+'.step'))
+    ctx.clean_up()
+
+
+def test_step_3():
+    prj = 'bom'
+    ctx = context.TestContext('STEP_3', prj, 'step_simple_3', STEP_DIR)
+    ctx.run()
+    # Check all outputs are there
+    ctx.expect_out_file(os.path.join(STEP_DIR, prj+'.step'))
+    ctx.clean_up()
diff --git a/tests/test_plot/test_svg.py b/tests/test_plot/test_svg.py
index 9c62b924..3541475b 100644
--- a/tests/test_plot/test_svg.py
+++ b/tests/test_plot/test_svg.py
@@ -8,8 +8,9 @@ pytest-3 --log-cli-level debug
 import os
 import sys
 # Look for the 'utils' module from where the script is running
-script_dir = os.path.dirname(os.path.abspath(__file__))
-sys.path.insert(0, os.path.dirname(script_dir))
+prev_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if prev_dir not in sys.path:
+    sys.path.insert(0, prev_dir)
 # Utils import
 from utils import context
 
diff --git a/tests/test_plot/test_yaml_errors.py b/tests/test_plot/test_yaml_errors.py
index 07014e5f..207aaa95 100644
--- a/tests/test_plot/test_yaml_errors.py
+++ b/tests/test_plot/test_yaml_errors.py
@@ -5,6 +5,8 @@ Tests various errors in the config file
 - Wrong kiplot.version
 - Missing drill map type
 - Wrong drill map type
+- Wrong step origin
+- Wrong step min_distance
 - Wrong layer:
   - Incorrect name
   - Inner.1, but no inner layers
@@ -105,3 +107,17 @@ def test_no_layers():
     ctx.run(EXIT_BAD_CONFIG)
     assert ctx.search_err("You must specify the layers for `PDF`")
     ctx.clean_up()
+
+
+def test_error_step_origin():
+    ctx = context.TestContext('ErrorStepOrigin', 'bom', 'error_step_origin', None)
+    ctx.run(EXIT_BAD_CONFIG)
+    assert ctx.search_err("Origin must be")
+    ctx.clean_up()
+
+
+def test_error_step_min_distance():
+    ctx = context.TestContext('ErrorStepMinDistance', 'bom', 'error_step_min_distance', None)
+    ctx.run(EXIT_BAD_CONFIG)
+    assert ctx.search_err("min_distance must be a number")
+    ctx.clean_up()
diff --git a/tests/yaml_samples/error_step_min_distance.kiplot.yaml b/tests/yaml_samples/error_step_min_distance.kiplot.yaml
new file mode 100644
index 00000000..da343931
--- /dev/null
+++ b/tests/yaml_samples/error_step_min_distance.kiplot.yaml
@@ -0,0 +1,14 @@
+kiplot:
+  version: 1
+
+outputs:
+  - name: Step
+    comment: "Generate 3D model (STEP)"
+    type: step
+    dir: 3D
+    options:
+      metric_units: false
+      origin: "3.2 , -10" # "grid" or "drill" o "X,Y" i.e. 3.2,-10
+      #no_virtual: false  # exclude 3D models for components with 'virtual' attribute
+      min_distance: bogus # Minimum distance between points to treat them as separate ones (default 0.01 mm)
+      #output: project.step
diff --git a/tests/yaml_samples/error_step_origin.kiplot.yaml b/tests/yaml_samples/error_step_origin.kiplot.yaml
new file mode 100644
index 00000000..5f3ff779
--- /dev/null
+++ b/tests/yaml_samples/error_step_origin.kiplot.yaml
@@ -0,0 +1,14 @@
+kiplot:
+  version: 1
+
+outputs:
+  - name: Step
+    comment: "Generate 3D model (STEP)"
+    type: step
+    dir: 3D
+    options:
+      metric_units: true
+      origin: bogus       # "grid" or "drill" o "X,Y" i.e. 3.2,-10
+      no_virtual: true    # exclude 3D models for components with 'virtual' attribute
+      min_distance: 0.01  # Minimum distance between points to treat them as separate ones (default 0.01 mm)
+      #output: project.step
diff --git a/tests/yaml_samples/step_simple.kiplot.yaml b/tests/yaml_samples/step_simple.kiplot.yaml
new file mode 100644
index 00000000..593e453f
--- /dev/null
+++ b/tests/yaml_samples/step_simple.kiplot.yaml
@@ -0,0 +1,14 @@
+kiplot:
+  version: 1
+
+outputs:
+  - name: Step
+    comment: "Generate 3D model (STEP)"
+    type: step
+    dir: 3D
+    options:
+      metric_units: true
+      origin: drill        # "grid" or "drill" o "X,Y" i.e. 3.2,-10
+      #no_virtual: false  # exclude 3D models for components with 'virtual' attribute
+      #min_distance: 0.01 # Minimum distance between points to treat them as separate ones (default 0.01 mm)
+      #output: project.step
diff --git a/tests/yaml_samples/step_simple_2.kiplot.yaml b/tests/yaml_samples/step_simple_2.kiplot.yaml
new file mode 100644
index 00000000..0b110cce
--- /dev/null
+++ b/tests/yaml_samples/step_simple_2.kiplot.yaml
@@ -0,0 +1,14 @@
+kiplot:
+  version: 1
+
+outputs:
+  - name: Step
+    comment: "Generate 3D model (STEP)"
+    type: step
+    dir: 3D
+    options:
+      metric_units: false
+      origin: "3.2,-10"    # "grid" or "drill" o "X,Y" i.e. 3.2,-10
+      no_virtual: true     # exclude 3D models for components with 'virtual' attribute
+      min_distance: 0.0004 # Minimum distance between points to treat them as separate ones (default 0.01 mm)
+      #output: project.step
diff --git a/tests/yaml_samples/step_simple_3.kiplot.yaml b/tests/yaml_samples/step_simple_3.kiplot.yaml
new file mode 100644
index 00000000..a3d75376
--- /dev/null
+++ b/tests/yaml_samples/step_simple_3.kiplot.yaml
@@ -0,0 +1,14 @@
+kiplot:
+  version: 1
+
+outputs:
+  - name: Step
+    comment: "Generate 3D model (STEP)"
+    type: step
+    dir: 3D
+    options:
+      metric_units: false
+      origin: grid         # "grid" or "drill" o "X,Y" i.e. 3.2,-10
+      no_virtual: true     # exclude 3D models for components with 'virtual' attribute
+      min_distance: 0.0004 # Minimum distance between points to treat them as separate ones (default 0.01 mm)
+      #output: project.step