diff --git a/modules/diamond/blastp/main.nf b/modules/diamond/blastp/main.nf
index 955952dc..d7c53d6f 100644
--- a/modules/diamond/blastp/main.nf
+++ b/modules/diamond/blastp/main.nf
@@ -11,10 +11,11 @@ process DIAMOND_BLASTP {
 
     input:
     tuple val(meta), path(fasta)
-    path  db
+    path db
+    val outext
 
     output:
-    tuple val(meta), path('*.txt'), emit: txt
+    tuple val(meta), path('*.{blast,xml,txt,daa,sam,tsv,paf}'), emit: output
     path "versions.yml"           , emit: versions
 
     when:
@@ -23,6 +24,15 @@ process DIAMOND_BLASTP {
     script:
     def args = task.ext.args ?: ''
     def prefix = task.ext.prefix ?: "${meta.id}"
+    switch ( outext ) {
+        case "blast": outfmt = 0; break
+        case "xml": outfmt = 5; break
+        case "txt": outfmt = 6; break
+        case "daa": outfmt = 100; break
+        case "sam": outfmt = 101; break
+        case "tsv": outfmt = 102; break
+        case "paf": outfmt = 103; break
+    }
     """
     DB=`find -L ./ -name "*.dmnd" | sed 's/.dmnd//'`
 
@@ -31,8 +41,9 @@ process DIAMOND_BLASTP {
         --threads $task.cpus \\
         --db \$DB \\
         --query $fasta \\
+        --outfmt ${outfmt} \\
         $args \\
-        --out ${prefix}.txt
+        --out ${prefix}.${outext}
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
diff --git a/modules/diamond/blastp/meta.yml b/modules/diamond/blastp/meta.yml
index 8ac1d371..1aa36c23 100644
--- a/modules/diamond/blastp/meta.yml
+++ b/modules/diamond/blastp/meta.yml
@@ -28,6 +28,14 @@ input:
       type: directory
       description: Directory containing the protein blast database
       pattern: "*"
+  - outext:
+      type: string
+      description: |
+        Specify the type of output file to be generated. `blast` corresponds to
+        BLAST pairwise format. `xml` corresponds to BLAST xml format.
+        `txt` corresponds to to BLAST tabular format. `tsv` corresponds to
+        taxonomic classification format.
+      pattern: "blast|xml|txt|daa|sam|tsv|paf"
 
 output:
   - txt:
@@ -41,3 +49,4 @@ output:
 
 authors:
   - "@spficklin"
+  - "@jfy133"
diff --git a/modules/diamond/blastx/main.nf b/modules/diamond/blastx/main.nf
index 3700bd36..6703c1e4 100644
--- a/modules/diamond/blastx/main.nf
+++ b/modules/diamond/blastx/main.nf
@@ -11,10 +11,11 @@ process DIAMOND_BLASTX {
 
     input:
     tuple val(meta), path(fasta)
-    path  db
+    path db
+    val outext
 
     output:
-    tuple val(meta), path('*.txt'), emit: txt
+    tuple val(meta), path('*.{blast,xml,txt,daa,sam,tsv,paf}'), emit: output
     path "versions.yml"           , emit: versions
 
     when:
@@ -23,6 +24,15 @@ process DIAMOND_BLASTX {
     script:
     def args = task.ext.args ?: ''
     def prefix = task.ext.prefix ?: "${meta.id}"
+    switch ( outext ) {
+        case "blast": outfmt = 0; break
+        case "xml": outfmt = 5; break
+        case "txt": outfmt = 6; break
+        case "daa": outfmt = 100; break
+        case "sam": outfmt = 101; break
+        case "tsv": outfmt = 102; break
+        case "paf": outfmt = 103; break
+    }
     """
     DB=`find -L ./ -name "*.dmnd" | sed 's/.dmnd//'`
 
@@ -31,8 +41,9 @@ process DIAMOND_BLASTX {
         --threads $task.cpus \\
         --db \$DB \\
         --query $fasta \\
+        --outfmt ${outfmt} \\
         $args \\
-        --out ${prefix}.txt
+        --out ${prefix}.${outext}
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
diff --git a/modules/diamond/blastx/meta.yml b/modules/diamond/blastx/meta.yml
index 7eb3d7b4..5ee2d55e 100644
--- a/modules/diamond/blastx/meta.yml
+++ b/modules/diamond/blastx/meta.yml
@@ -28,6 +28,14 @@ input:
       type: directory
       description: Directory containing the nucelotide blast database
       pattern: "*"
+  - outext:
+      type: string
+      description: |
+        Specify the type of output file to be generated. `blast` corresponds to
+        BLAST pairwise format. `xml` corresponds to BLAST xml format.
+        `txt` corresponds to to BLAST tabular format. `tsv` corresponds to
+        taxonomic classification format.
+      pattern: "blast|xml|txt|daa|sam|tsv|paf"
 
 output:
   - txt:
@@ -41,3 +49,4 @@ output:
 
 authors:
   - "@spficklin"
+  - "@jfy133"
diff --git a/tests/modules/diamond/blastp/main.nf b/tests/modules/diamond/blastp/main.nf
index 87d05bf9..5c1459d8 100644
--- a/tests/modules/diamond/blastp/main.nf
+++ b/tests/modules/diamond/blastp/main.nf
@@ -9,7 +9,18 @@ workflow test_diamond_blastp {
 
     db = [ file(params.test_data['sarscov2']['genome']['genome_fasta'], checkIfExists: true) ]
     fasta = [ file(params.test_data['sarscov2']['genome']['transcriptome_fasta'], checkIfExists: true) ]
+    outext = 'txt'
 
     DIAMOND_MAKEDB ( db )
-    DIAMOND_BLASTP ( [ [id:'test'], fasta ], DIAMOND_MAKEDB.out.db )
+    DIAMOND_BLASTP ( [ [id:'test'], fasta ], DIAMOND_MAKEDB.out.db, outext )
+}
+
+workflow test_diamond_blastp_daa {
+
+    db = [ file(params.test_data['sarscov2']['genome']['genome_fasta'], checkIfExists: true) ]
+    fasta = [ file(params.test_data['sarscov2']['genome']['transcriptome_fasta'], checkIfExists: true) ]
+    outext = 'daa'
+
+    DIAMOND_MAKEDB ( db )
+    DIAMOND_BLASTP ( [ [id:'test'], fasta ], DIAMOND_MAKEDB.out.db, outext )
 }
diff --git a/tests/modules/diamond/blastp/test.yml b/tests/modules/diamond/blastp/test.yml
index 32dfacaa..5e31df1f 100644
--- a/tests/modules/diamond/blastp/test.yml
+++ b/tests/modules/diamond/blastp/test.yml
@@ -1,8 +1,23 @@
-- name: diamond blastp
-  command: nextflow run ./tests/modules/diamond/blastp -entry test_diamond_blastp -c ./tests/config/nextflow.config -c ./tests/modules/diamond/blastp/nextflow.config
+- name: diamond blastp test_diamond_blastp
+  command: nextflow run tests/modules/diamond/blastp -entry test_diamond_blastp -c tests/config/nextflow.config
   tags:
     - diamond
     - diamond/blastp
   files:
-    - path: ./output/diamond/test.diamond_blastp.txt
+    - path: output/diamond/genome.fasta.dmnd
+      md5sum: 2447fb376394c20d43ea3aad2aa5d15d
+    - path: output/diamond/test.diamond_blastp.txt
       md5sum: 3ca7f6290c1d8741c573370e6f8b4db0
+    - path: output/diamond/versions.yml
+
+- name: diamond blastp test_diamond_blastp_daa
+  command: nextflow run tests/modules/diamond/blastp -entry test_diamond_blastp_daa -c tests/config/nextflow.config
+  tags:
+    - diamond
+    - diamond/blastp
+  files:
+    - path: output/diamond/genome.fasta.dmnd
+      md5sum: 2447fb376394c20d43ea3aad2aa5d15d
+    - path: output/diamond/test.diamond_blastp.daa
+      md5sum: d4a79ad1fcb2ec69460e5a09a9468db7
+    - path: output/diamond/versions.yml
diff --git a/tests/modules/diamond/blastx/main.nf b/tests/modules/diamond/blastx/main.nf
index 77eb08ea..d6d5a77a 100644
--- a/tests/modules/diamond/blastx/main.nf
+++ b/tests/modules/diamond/blastx/main.nf
@@ -9,7 +9,18 @@ workflow test_diamond_blastx {
 
     db = [ file(params.test_data['sarscov2']['genome']['genome_fasta'], checkIfExists: true) ]
     fasta = [ file(params.test_data['sarscov2']['genome']['transcriptome_fasta'], checkIfExists: true) ]
+    outext = 'txt'
 
     DIAMOND_MAKEDB ( db )
-    DIAMOND_BLASTX ( [ [id:'test'], fasta ], DIAMOND_MAKEDB.out.db )
+    DIAMOND_BLASTX ( [ [id:'test'], fasta ], DIAMOND_MAKEDB.out.db, outext )
+}
+
+workflow test_diamond_blastx_daa {
+
+    db = [ file(params.test_data['sarscov2']['genome']['genome_fasta'], checkIfExists: true) ]
+    fasta = [ file(params.test_data['sarscov2']['genome']['transcriptome_fasta'], checkIfExists: true) ]
+    outext = 'daa'
+
+    DIAMOND_MAKEDB ( db )
+    DIAMOND_BLASTX ( [ [id:'test'], fasta ], DIAMOND_MAKEDB.out.db, outext )
 }
diff --git a/tests/modules/diamond/blastx/test.yml b/tests/modules/diamond/blastx/test.yml
index fe7c6938..6a792f30 100644
--- a/tests/modules/diamond/blastx/test.yml
+++ b/tests/modules/diamond/blastx/test.yml
@@ -1,8 +1,24 @@
-- name: diamond blastx
-  command: nextflow run ./tests/modules/diamond/blastx -entry test_diamond_blastx -c ./tests/config/nextflow.config -c ./tests/modules/diamond/blastx/nextflow.config
+- name: diamond blastx test_diamond_blastx
+  command: nextflow run tests/modules/diamond/blastx -entry test_diamond_blastx -c tests/config/nextflow.config
   tags:
     - diamond
     - diamond/blastx
   files:
-    - path: ./output/diamond/test.diamond_blastx.txt
-      md5sum: d41d8cd98f00b204e9800998ecf8427e
+    - path: output/diamond/genome.fasta.dmnd
+      md5sum: 2447fb376394c20d43ea3aad2aa5d15d
+    - path: output/diamond/test.diamond_blastx.txt
+    - path: output/diamond/versions.yml
+      md5sum: 747934f57b7c0f8901570500f206eac6
+
+- name: diamond blastx test_diamond_blastx_daa
+  command: nextflow run tests/modules/diamond/blastx -entry test_diamond_blastx_daa -c tests/config/nextflow.config
+  tags:
+    - diamond
+    - diamond/blastx
+  files:
+    - path: output/diamond/genome.fasta.dmnd
+      md5sum: 2447fb376394c20d43ea3aad2aa5d15d
+    - path: output/diamond/test.diamond_blastx.daa
+      md5sum: 2a0ce0f7e01dcead828b87d5cbaccf7a
+    - path: output/diamond/versions.yml
+      md5sum: 05cbabfd500fc17e26b3d8061c5a78c3