diff --git a/modules/hifiasm/functions.nf b/modules/hifiasm/functions.nf
new file mode 100644
index 00000000..da9da093
--- /dev/null
+++ b/modules/hifiasm/functions.nf
@@ -0,0 +1,68 @@
+//
+//  Utility functions used in nf-core DSL2 module files
+//
+
+//
+// Extract name of software tool from process name using $task.process
+//
+def getSoftwareName(task_process) {
+    return task_process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()
+}
+
+//
+// Function to initialise default values and to generate a Groovy Map of available options for nf-core modules
+//
+def initOptions(Map args) {
+    def Map options = [:]
+    options.args            = args.args ?: ''
+    options.args2           = args.args2 ?: ''
+    options.args3           = args.args3 ?: ''
+    options.publish_by_meta = args.publish_by_meta ?: []
+    options.publish_dir     = args.publish_dir ?: ''
+    options.publish_files   = args.publish_files
+    options.suffix          = args.suffix ?: ''
+    return options
+}
+
+//
+// Tidy up and join elements of a list to return a path string
+//
+def getPathFromList(path_list) {
+    def paths = path_list.findAll { item -> !item?.trim().isEmpty() }      // Remove empty entries
+    paths     = paths.collect { it.trim().replaceAll("^[/]+|[/]+\$", "") } // Trim whitespace and trailing slashes
+    return paths.join('/')
+}
+
+//
+// Function to save/publish module results
+//
+def saveFiles(Map args) {
+    if (!args.filename.endsWith('.version.txt')) {
+        def ioptions  = initOptions(args.options)
+        def path_list = [ ioptions.publish_dir ?: args.publish_dir ]
+        if (ioptions.publish_by_meta) {
+            def key_list = ioptions.publish_by_meta instanceof List ? ioptions.publish_by_meta : args.publish_by_meta
+            for (key in key_list) {
+                if (args.meta && key instanceof String) {
+                    def path = key
+                    if (args.meta.containsKey(key)) {
+                        path = args.meta[key] instanceof Boolean ? "${key}_${args.meta[key]}".toString() : args.meta[key]
+                    }
+                    path = path instanceof String ? path : ''
+                    path_list.add(path)
+                }
+            }
+        }
+        if (ioptions.publish_files instanceof Map) {
+            for (ext in ioptions.publish_files) {
+                if (args.filename.endsWith(ext.key)) {
+                    def ext_list = path_list.collect()
+                    ext_list.add(ext.value)
+                    return "${getPathFromList(ext_list)}/$args.filename"
+                }
+            }
+        } else if (ioptions.publish_files == null) {
+            return "${getPathFromList(path_list)}/$args.filename"
+        }
+    }
+}
diff --git a/modules/hifiasm/main.nf b/modules/hifiasm/main.nf
new file mode 100644
index 00000000..5d005ee4
--- /dev/null
+++ b/modules/hifiasm/main.nf
@@ -0,0 +1,65 @@
+// Import generic module functions
+include { initOptions; saveFiles; getSoftwareName } from './functions'
+
+params.options = [:]
+options        = initOptions(params.options)
+
+process HIFIASM {
+    tag "$meta.id"
+    label 'process_high'
+    publishDir "${params.outdir}",
+        mode: params.publish_dir_mode,
+        saveAs: { filename -> saveFiles(filename:filename, options:params.options, publish_dir:getSoftwareName(task.process), meta:meta, publish_by_meta:['id']) }
+
+    conda (params.enable_conda ? "bioconda::hifiasm=0.15.4" : null)
+    if (workflow.containerEngine == 'singularity' && !params.singularity_pull_docker_container) {
+        container "https://depot.galaxyproject.org/singularity/hifiasm:0.15.4--h2e03b76_0"
+    } else {
+        container "quay.io/biocontainers/hifiasm:0.15.4--h2e03b76_0"
+    }
+
+    input:
+    tuple val(meta), path(reads)
+    path  paternal_kmer_dump
+    path  maternal_kmer_dump
+    val   use_parental_kmers
+
+    output:
+    tuple val(meta), path("*.r_utg.gfa")       , emit: raw_unitigs
+    tuple val(meta), path("*.ec.bin")          , emit: corrected_reads
+    tuple val(meta), path("*.ovlp.source.bin") , emit: source_overlaps
+    tuple val(meta), path("*.ovlp.reverse.bin"), emit: reverse_overlaps
+    tuple val(meta), path("*.p_utg.gfa")       , emit: processed_unitigs, optional: true
+    tuple val(meta), path("*.asm.p_ctg.gfa")   , emit: primary_contigs  , optional: true
+    tuple val(meta), path("*.asm.a_ctg.gfa")   , emit: alternate_contigs, optional: true
+    tuple val(meta), path("*.hap1.p_ctg.gfa")  , emit: paternal_contigs , optional: true
+    tuple val(meta), path("*.hap2.p_ctg.gfa")  , emit: maternal_contigs , optional: true
+    path  "*.version.txt"                      , emit: version
+
+    script:
+    def software = getSoftwareName(task.process)
+    def prefix   = options.suffix ? "${meta.id}${options.suffix}" : "${meta.id}"
+    if (use_parental_kmers) {
+        """
+        hifiasm \\
+            $options.args \\
+            -o ${prefix}.asm \\
+            -t $task.cpus \\
+            -1 $paternal_kmer_dump \\
+            -2 $maternal_kmer_dump \\
+            $reads
+
+        echo \$(hifiasm --version 2>&1) > ${software}.version.txt
+        """
+    } else { // Phasing with Hi-C data is not supported yet
+        """
+        hifiasm \\
+            $options.args \\
+            -o ${prefix}.asm \\
+            -t $task.cpus \\
+            $reads
+
+        echo \$(hifiasm --version 2>&1) > ${software}.version.txt
+        """
+    }
+}
diff --git a/modules/hifiasm/meta.yml b/modules/hifiasm/meta.yml
new file mode 100644
index 00000000..dc414b93
--- /dev/null
+++ b/modules/hifiasm/meta.yml
@@ -0,0 +1,87 @@
+name: hifiasm
+description: Whole-genome assembly using PacBio HiFi reads
+keywords:
+  - genome assembly
+  - haplotype resolution
+  - phasing
+  - PacBio
+  - HiFi
+  - long reads
+tools:
+  - hifiasm:
+      description: Haplotype-resolved assembler for accurate HiFi reads
+      homepage: https://github.com/chhylp123/hifiasm
+      documentation: https://github.com/chhylp123/hifiasm
+      tool_dev_url: https://github.com/chhylp123/hifiasm
+      doi: "10.1038/s41592-020-01056-5"
+      licence: ["MIT"]
+
+input:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - reads:
+      type: file
+      description: FASTQ file with PacBio HiFi reads
+      pattern: "*.{fastq}"
+  - paternal_kmer_dump:
+      type: file
+      description: Yak kmer dump file for paternal reads (can be used for haplotype resolution). It can have an arbitrary extension.
+  - maternal_kmer_dump:
+      type: file
+      description: Yak kmer dump file for maternal reads (can be used for haplotype resolution). It can have an arbitrary extension.
+  - use_parental_kmers:
+      type: logical
+      description: A flag (true or false) signalling if the module should use the paternal and maternal kmer dumps.
+
+output:
+  - meta:
+      type: map
+      description: |
+        Groovy Map containing sample information
+        e.g. [ id:'test', single_end:false ]
+  - version:
+      type: file
+      description: File containing software version
+      pattern: "*.{version.txt}"
+  - raw_unitigs:
+      type: file
+      description: Raw unitigs
+      pattern: "*.r_utg.gfa"
+  - processed_unitigs:
+      type: file
+      description: Processed unitigs
+      pattern: "*.p_utg.gfa"
+  - primary_contigs:
+      type: file
+      description: Primary contigs
+      pattern: "*.asm.p_ctg.gfa"
+  - alternate_contigs:
+      type: file
+      description: Alternative contigs
+      pattern: "*.asm.a_ctg.gfa"
+  - paternal_contigs:
+      type: file
+      description: Paternal contigs
+      pattern: "*.hap1.p_ctg.gfa"
+  - maternal_contigs:
+      type: file
+      description: Maternal contigs
+      pattern: "*.hap2.p_ctg.gfa"
+  - corrected_reads:
+      type: file
+      description: Corrected reads
+      pattern: "*.ec.bin"
+  - source_overlaps:
+      type: file
+      description: Source overlaps
+      pattern: "*.ovlp.source.bin"
+  - reverse_overlaps:
+      type: file
+      description: Reverse overlaps
+      pattern: "*.ovlp.reverse.bin"
+
+authors:
+  - "@sidorov-si"
diff --git a/tests/config/pytest_modules.yml b/tests/config/pytest_modules.yml
index 92748eca..d56a8695 100644
--- a/tests/config/pytest_modules.yml
+++ b/tests/config/pytest_modules.yml
@@ -346,6 +346,10 @@ gunzip:
   - modules/gunzip/**
   - tests/modules/gunzip/**
 
+hifiasm:
+  - modules/hifiasm/**
+  - tests/modules/hifiasm/**
+
 hisat2/align:
   - modules/hisat2/align/**
   - modules/hisat2/build/**
diff --git a/tests/config/test_data.config b/tests/config/test_data.config
index 314a2329..7b6e3cfd 100644
--- a/tests/config/test_data.config
+++ b/tests/config/test_data.config
@@ -158,6 +158,12 @@ params {
 
                 test_10x_1_fastq_gz                           = "${test_data_dir}/genomics/homo_sapiens/illumina/10xgenomics/test.10x_1.fastq.gz"
                 test_10x_2_fastq_gz                           = "${test_data_dir}/genomics/homo_sapiens/illumina/10xgenomics/test.10x_2.fastq.gz"
+
+                test_yak                                      = "${test_data_dir}/genomics/homo_sapiens/illumina/yak/test.yak"
+                test2_yak                                     = "${test_data_dir}/genomics/homo_sapiens/illumina/yak/test2.yak"
+            }
+            'pacbio' {
+                test_hifi_fastq_gz                            = "${test_data_dir}/genomics/homo_sapiens/pacbio/fastq/test_hifi.fastq.gz"
             }
         }
     }
diff --git a/tests/modules/hifiasm/main.nf b/tests/modules/hifiasm/main.nf
new file mode 100644
index 00000000..aeb64fb2
--- /dev/null
+++ b/tests/modules/hifiasm/main.nf
@@ -0,0 +1,31 @@
+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl = 2
+
+include { HIFIASM } from '../../../modules/hifiasm/main.nf' addParams( options: [args:'-f0'] )
+
+/*
+ * Test with long reads only
+ */
+workflow test_hifiasm_hifi_only {
+    input = [
+        [ id:'test' ], // meta map
+        [ file(params.test_data['homo_sapiens']['pacbio']['test_hifi_fastq_gz'], checkIfExists: true) ]
+    ]
+
+    HIFIASM ( input, [], [], false )
+}
+
+/*
+ * Test with parental reads for phasing
+ */
+workflow test_hifiasm_with_parental_reads {
+    input = [
+        [ id:'test' ], // meta map
+        [ file(params.test_data['homo_sapiens']['pacbio']['test_hifi_fastq_gz'], checkIfExists: true) ]
+    ]
+    paternal_kmer_dump = file(params.test_data['homo_sapiens']['illumina']['test_yak'], checkIfExists: true)
+    maternal_kmer_dump = file(params.test_data['homo_sapiens']['illumina']['test2_yak'], checkIfExists: true)
+
+    HIFIASM ( input, paternal_kmer_dump, maternal_kmer_dump, true )
+}
diff --git a/tests/modules/hifiasm/test.yml b/tests/modules/hifiasm/test.yml
new file mode 100644
index 00000000..47d9e38f
--- /dev/null
+++ b/tests/modules/hifiasm/test.yml
@@ -0,0 +1,33 @@
+- name: hifiasm test_hifiasm_hifi_only
+  command: nextflow run tests/modules/hifiasm -entry test_hifiasm_hifi_only -c tests/config/nextflow.config
+  tags:
+    - hifiasm
+  files:
+    - path: output/hifiasm/test.asm.bp.hap1.p_ctg.gfa
+      md5sum: 73b0c1b01d445db91c269034b8660501
+    - path: output/hifiasm/test.asm.bp.hap2.p_ctg.gfa
+      md5sum: 76847b7835185ab92611a820467c0066
+    - path: output/hifiasm/test.asm.bp.p_utg.gfa
+      md5sum: 97446fb95de214835c36b10a90838486
+    - path: output/hifiasm/test.asm.bp.r_utg.gfa
+      md5sum: 97446fb95de214835c36b10a90838486
+    - path: output/hifiasm/test.asm.ec.bin
+    - path: output/hifiasm/test.asm.ovlp.reverse.bin
+    - path: output/hifiasm/test.asm.ovlp.source.bin
+
+- name: hifiasm test_hifiasm_with_parental_reads
+  command: nextflow run tests/modules/hifiasm -entry test_hifiasm_with_parental_reads -c tests/config/nextflow.config
+  tags:
+    - hifiasm
+  files:
+    - path: output/hifiasm/test.asm.dip.hap1.p_ctg.gfa
+      md5sum: 16907b1aea2081884deb9d039dd14038
+    - path: output/hifiasm/test.asm.dip.hap2.p_ctg.gfa
+      md5sum: d283479bf72a31d0cc34f880535d0bd4
+    - path: output/hifiasm/test.asm.dip.p_utg.gfa
+      md5sum: 97446fb95de214835c36b10a90838486
+    - path: output/hifiasm/test.asm.dip.r_utg.gfa
+      md5sum: 97446fb95de214835c36b10a90838486
+    - path: output/hifiasm/test.asm.ec.bin
+    - path: output/hifiasm/test.asm.ovlp.reverse.bin
+    - path: output/hifiasm/test.asm.ovlp.source.bin