diff --git a/tests/zfs-tests/tests/perf/fio/mkfiles.fio b/tests/zfs-tests/tests/perf/fio/mkfiles.fio
index 2134a93550..36ec22d492 100644
--- a/tests/zfs-tests/tests/perf/fio/mkfiles.fio
+++ b/tests/zfs-tests/tests/perf/fio/mkfiles.fio
@@ -25,9 +25,9 @@ thread=1
 directory=${DIRECTORY}
 numjobs=${NUMJOBS}
 filesize=${FILE_SIZE}
-randseed=${RANDSEED}
-buffer_compress_percentage=${COMPPERCENT}
+randseed=${PERF_RANDSEED}
+buffer_compress_percentage=${PERF_COMPPERCENT}
 buffer_pattern=0xdeadbeef
-buffer_compress_chunk=${COMPCHUNK}
+buffer_compress_chunk=${PERF_COMPCHUNK}
 
 [job]
diff --git a/tests/zfs-tests/tests/perf/regression/random_reads.ksh b/tests/zfs-tests/tests/perf/regression/random_reads.ksh
index 8e2058666e..e6d207e227 100755
--- a/tests/zfs-tests/tests/perf/regression/random_reads.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_reads.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -58,9 +58,9 @@ export TOTAL_SIZE=$(($(get_prop avail $PERFPOOL) * 3 / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16 32 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -68,9 +68,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 128k'}
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'16 32'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh b/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh
index 625960a277..573e9c7d4c 100755
--- a/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -58,9 +58,9 @@ export TOTAL_SIZE=$(($(get_prop avail $PERFPOOL) * 3 / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'4 8 16 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -68,9 +68,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=''		# bssplit used instead
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'32 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh b/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh
index e6272992d0..78af5213a3 100755
--- a/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh
@@ -1,5 +1,6 @@
 #!/bin/ksh
-# file and its contents are supplied under the terms of the
+
+# This file and its contents are supplied under the terms of the
 # Common Development and Distribution License ("CDDL"), version 1.0.
 # You may only use this file in accordance with the terms of version
 # 1.0 of the CDDL.
@@ -10,7 +11,7 @@
 #
 
 #
-# Copyright (c) 2017 by Delphix. All rights reserved.
+# Copyright (c) 2017, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -47,9 +48,9 @@ export TOTAL_SIZE=$(($(get_prop avail $PERFPOOL) * 3 / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16 32 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -57,9 +58,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES='8k 64k'
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'64 128'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/random_writes.ksh b/tests/zfs-tests/tests/perf/regression/random_writes.ksh
index cba27b29d4..dca013cbae 100755
--- a/tests/zfs-tests/tests/perf/regression/random_writes.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_writes.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -57,9 +57,9 @@ export TOTAL_SIZE=$(($(get_prop avail $PERFPOOL) * 3 / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'1 4 8 16 32 64 128'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -67,9 +67,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 256k'}
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'32 128'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh b/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh
index 7d3ea6cf90..5d4fd77a74 100755
--- a/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 . $STF_SUITE/include/libtest.shlib
@@ -45,9 +45,9 @@ export TOTAL_SIZE=$(($(get_prop avail $PERFPOOL) * 3 / 2))
 
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'1 2 4 8 16 32 64 128'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0 1'}
@@ -56,9 +56,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'1 4 16 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0 1'}
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh
index 265acb50b1..e5cf627839 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -58,9 +58,9 @@ export TOTAL_SIZE=$(($(get_prop avail $PERFPOOL) * 3 / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16 32 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -68,9 +68,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 128k'}
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh
index 9163a903c3..d44e37f3ea 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -48,9 +48,9 @@ export TOTAL_SIZE=$(($(get_max_arc_size) / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16 32 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -58,9 +58,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 128k'}
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'64 128'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh
index b431528f96..1b3ee85ec5 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -54,9 +54,9 @@ export TOTAL_SIZE=$(($(get_max_arc_size) / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16 32 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -64,9 +64,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 128k'}
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'64 128'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh
index eeb703dd6e..944a3d13c1 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2016 by Delphix. All rights reserved.
+# Copyright (c) 2016, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -52,9 +52,9 @@ export TOTAL_SIZE=$(($(get_max_dbuf_cache_size) * 3 / 4))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'8 16 32 64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -62,9 +62,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 128k'}
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'64'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh b/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh
index e2f4cf67ed..b4f466c4f6 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2016 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
 #
 
 #
@@ -57,9 +57,9 @@ export TOTAL_SIZE=$(($(get_prop avail $PERFPOOL) * 3 / 2))
 # Variables for use by fio.
 if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_WEEKLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'weekly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'1 4 8 16 32 64 128'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
@@ -67,9 +67,9 @@ if [[ -n $PERF_REGRESSION_WEEKLY ]]; then
 	export PERF_IOSIZES=${PERF_IOSIZES:-'8k 64k 256k'}
 elif [[ -n $PERF_REGRESSION_NIGHTLY ]]; then
 	export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-	export RANDSEED=${PERF_RANDSEED:-'1234'}
-	export COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-	export COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+	export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
+	export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
+	export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
 	export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 	export PERF_NTHREADS=${PERF_NTHREADS:-'16 32'}
 	export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}