diff --git a/tests/data/test1400 b/tests/data/test1400
index 838fe6387a..e820843241 100644
--- a/tests/data/test1400
+++ b/tests/data/test1400
@@ -27,6 +27,9 @@ http
  <name>
 --libcurl for simple HTTP GET
  </name>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
  <command>
 http://%HOSTIP:%HTTPPORT/we/want/1400 --libcurl log/test1400.c
 </command>
diff --git a/tests/data/test1401 b/tests/data/test1401
index 1e2b4a77fc..34469a3761 100644
--- a/tests/data/test1401
+++ b/tests/data/test1401
@@ -31,6 +31,9 @@ http
  <name>
 --libcurl for GET with various options
  </name>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
  <command>
 http://%HOSTIP:%HTTPPORT/we/want/1401 --libcurl log/test1401.c --basic -u fake:user -H "X-Files: Mulder" -H "X-Men: cyclops, iceman" -A MyUA -b chocolate=chip --proto "=http,ftp,file"
 </command>
diff --git a/tests/data/test1402 b/tests/data/test1402
index 07c3f491db..bf22695e69 100644
--- a/tests/data/test1402
+++ b/tests/data/test1402
@@ -28,6 +28,9 @@ http
  <name>
 --libcurl for simple POST
  </name>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
  <command>
 http://%HOSTIP:%HTTPPORT/we/want/1402 --libcurl log/test1402.c -d "foo=bar" -d "baz=quux"
 </command>
diff --git a/tests/data/test1403 b/tests/data/test1403
index 18167b4fd8..1a0fc7d8fc 100644
--- a/tests/data/test1403
+++ b/tests/data/test1403
@@ -28,6 +28,9 @@ http
  <name>
 --libcurl for GET with query
  </name>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
  <command>
 http://%HOSTIP:%HTTPPORT/we/want/1403 --libcurl log/test1403.c -G -d "foo=bar" -d "baz=quux"
 </command>
diff --git a/tests/data/test1404 b/tests/data/test1404
index 6f53ca8cf6..c0bb81b580 100644
--- a/tests/data/test1404
+++ b/tests/data/test1404
@@ -29,6 +29,9 @@ http
  <name>
 --libcurl for HTTP RFC1867-type formposting - -F with three files, one with explicit type
  </name>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
  <command>
 http://%HOSTIP:%HTTPPORT/we/want/1404 -F name=value -F 'file=@log/test1404.txt,log/test1404.txt;type=magic/content,log/test1404.txt' --libcurl log/test1404.c
 </command>
diff --git a/tests/data/test1405 b/tests/data/test1405
index 4e8d46d7f1..041d9f3bdf 100644
--- a/tests/data/test1405
+++ b/tests/data/test1405
@@ -32,6 +32,9 @@ ftp
  <name>
 --libcurl for FTP with quote ops
  </name>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
  <command>
 ftp://%HOSTIP:%FTPPORT/1405 -Q "NOOP 1" -Q "+NOOP 2" -Q "-NOOP 3" -Q "*FAIL" -Q "+*FAIL HARD" --libcurl log/test1405.c
 </command>
diff --git a/tests/data/test1406 b/tests/data/test1406
index 0ccb08a77c..c01d2e3e94 100644
--- a/tests/data/test1406
+++ b/tests/data/test1406
@@ -25,6 +25,9 @@ smtp
  <name>
 --libcurl for SMTP
  </name>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
 <file name="log/test1406.eml">
 From: different
 To: another
diff --git a/tests/data/test1407 b/tests/data/test1407
index 981e4e4142..922e42231d 100644
--- a/tests/data/test1407
+++ b/tests/data/test1407
@@ -26,7 +26,10 @@ pop3
  <name>
 --libcurl for POP3 LIST one message
  </name>
- <command>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
+<command>
 pop3://%HOSTIP:%POP3PORT/1407 -l -u user:secret --libcurl log/test1407.c
 </command>
 </client>
diff --git a/tests/data/test1420 b/tests/data/test1420
index a20f898687..3cff4628d3 100644
--- a/tests/data/test1420
+++ b/tests/data/test1420
@@ -32,7 +32,10 @@ imap
  <name>
 --libcurl for IMAP FETCH message
  </name>
- <command>
+<setenv>
+SSL_CERT_FILE=
+</setenv>
+<command>
 'imap://%HOSTIP:%IMAPPORT/1420/;UID=1' -u user:secret --libcurl log/test1420.c
 </command>
 </client>