diff --git a/modules/cnvkit/reference/main.nf b/modules/cnvkit/reference/main.nf
new file mode 100644
index 00000000..1f0b20d8
--- /dev/null
+++ b/modules/cnvkit/reference/main.nf
@@ -0,0 +1,39 @@
+process CNVKIT_REFERENCE {
+    tag "$reference"
+    label 'process_low'
+
+    conda (params.enable_conda ? "bioconda::cnvkit=0.9.9" : null)
+    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
+        'https://depot.galaxyproject.org/singularity/cnvkit:0.9.9--pyhdfd78af_0':
+        'quay.io/biocontainers/cnvkit:0.9.9--pyhdfd78af_0' }"
+
+    input:
+    path    fasta
+    path    targets
+    path    antitargets
+
+    output:
+    path("*.cnn")                 , emit: cnn
+    path "versions.yml"           , emit: versions
+
+    when:
+    task.ext.when == null || task.ext.when
+
+    script:
+    def args = task.ext.args ?: ''
+
+    """
+    cnvkit.py \\
+        reference \\
+        --fasta $fasta \\
+        --targets $targets \\
+        --antitargets $antitargets \\
+        --output reference.cnn \\
+        $args
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        cnvkit: \$(cnvkit.py version | sed -e "s/cnvkit v//g")
+    END_VERSIONS
+    """
+}
diff --git a/modules/cnvkit/reference/meta.yml b/modules/cnvkit/reference/meta.yml
new file mode 100644
index 00000000..2e0fef1a
--- /dev/null
+++ b/modules/cnvkit/reference/meta.yml
@@ -0,0 +1,47 @@
+name: cnvkit_reference
+description:
+keywords:
+  - cnvkit
+  - reference
+tools:
+  - cnvkit:
+      description: |
+        CNVkit is a Python library and command-line software toolkit to infer and visualize copy number from high-throughput DNA sequencing data.
+        It is designed for use with hybrid capture, including both whole-exome and custom target panels, and short-read sequencing platforms such as Illumina and Ion Torrent.
+      homepage: https://cnvkit.readthedocs.io/en/stable/index.html
+      documentation: https://cnvkit.readthedocs.io/en/stable/index.html
+      tool_dev_url: https://github.com/etal/cnvkit
+      doi: 10.1371/journal.pcbi.1004873
+      licence: ["Apache-2.0"]
+
+input:
+  - fasta:
+      type: file
+      description: File containing reference genome
+      pattern: "*.{fasta}"
+  - targets:
+      type: file
+      description: File containing genomic regions
+      pattern: "*.{bed}"
+  - antitargets:
+      type: file
+      description: File containing off-target genomic regions
+      pattern: "*.{bed}"
+
+output:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - reference:
+      type: file
+      description: File containing a copy-number reference (required for CNV calling in tumor_only mode)
+      pattern: "*.{cnn}"
+  - versions:
+      type: file
+      description: File containing software versions
+      pattern: "versions.yml"
+
+authors:
+  - "@SusiJo"
diff --git a/tests/config/pytest_modules.yml b/tests/config/pytest_modules.yml
index 78e85487..0e5a1815 100644
--- a/tests/config/pytest_modules.yml
+++ b/tests/config/pytest_modules.yml
@@ -451,6 +451,10 @@ cnvkit/batch:
   - modules/cnvkit/batch/**
   - tests/modules/cnvkit/batch/**
 
+cnvkit/reference:
+  - modules/cnvkit/reference/**
+  - tests/modules/cnvkit/reference/**
+
 controlfreec/assesssignificance:
   - modules/controlfreec/assesssignificance/**
   - tests/modules/controlfreec/assesssignificance/**
diff --git a/tests/modules/cnvkit/reference/main.nf b/tests/modules/cnvkit/reference/main.nf
new file mode 100644
index 00000000..bd7009c0
--- /dev/null
+++ b/tests/modules/cnvkit/reference/main.nf
@@ -0,0 +1,14 @@
+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl = 2
+
+include { CNVKIT_REFERENCE } from '../../../../modules/cnvkit/reference/main.nf'
+
+workflow test_cnvkit_reference {
+
+    fasta       = file(params.test_data['homo_sapiens']['genome']['genome_21_fasta'], checkIfExists: true)
+    targets     = file(params.test_data['homo_sapiens']['genome']['genome_21_multi_interval_bed'], checkIfExists: true)
+    antitargets = file("/Users/susanne/Documents/repos/forks/modules/test_antitarget/output/cnvkit/test.antitarget.bed", checkIfExists: true)
+
+    CNVKIT_REFERENCE ( fasta, targets, antitargets )
+}
diff --git a/tests/modules/cnvkit/reference/nextflow.config b/tests/modules/cnvkit/reference/nextflow.config
new file mode 100644
index 00000000..50f50a7a
--- /dev/null
+++ b/tests/modules/cnvkit/reference/nextflow.config
@@ -0,0 +1,5 @@
+process {
+
+    publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }
+    
+}
\ No newline at end of file
diff --git a/tests/modules/cnvkit/reference/test.yml b/tests/modules/cnvkit/reference/test.yml
new file mode 100644
index 00000000..b1b8c896
--- /dev/null
+++ b/tests/modules/cnvkit/reference/test.yml
@@ -0,0 +1,8 @@
+- name: cnvkit reference test_cnvkit_reference
+  command: nextflow run ./tests/modules/cnvkit/reference -entry test_cnvkit_reference -c ./tests/config/nextflow.config  -c ./tests/modules/cnvkit/reference/nextflow.config
+  tags:
+    - cnvkit/reference
+    - cnvkit
+  files:
+    - path: output/cnvkit/reference.cnn
+      md5sum: 7c4a7902f5ab101b1f9d6038d331b3d9