diff --git a/lib/dml/tests/dml_test.php b/lib/dml/tests/dml_test.php
index fb144e9c736..a87c36239af 100644
--- a/lib/dml/tests/dml_test.php
+++ b/lib/dml/tests/dml_test.php
@@ -2321,7 +2321,7 @@ class core_dml_testcase extends database_driver_testcase {
         $record->id = '1';
         $record->course = '1';
         $record->oneint = null;
-        $record->onenum = '1.00';
+        $record->onenum = 1.0;
         $record->onechar = 'a';
         $record->onetext = 'aaa';
 
diff --git a/question/engine/tests/datalib_reporting_queries_test.php b/question/engine/tests/datalib_reporting_queries_test.php
index 8bbe0c81340..06ccce4e651 100644
--- a/question/engine/tests/datalib_reporting_queries_test.php
+++ b/question/engine/tests/datalib_reporting_queries_test.php
@@ -146,7 +146,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[0]][$this->allslots[0]];
         $this->assertEquals((object) array(
             'questionid'     => $this->sa->id,
-            'maxmark'        => '5.0000000',
+            'maxmark'        => 5.0,
             'sequencenumber' => 2,
             'state'          => (string) question_state::$gradedright,
         ), $state);
@@ -154,7 +154,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[0]][$this->allslots[1]];
         $this->assertEquals((object) array(
             'questionid'     => $this->essay->id,
-            'maxmark'        => '10.0000000',
+            'maxmark'        => 10.0,
             'sequencenumber' => 2,
             'state'          => (string) question_state::$needsgrading,
         ), $state);
@@ -162,7 +162,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[1]][$this->allslots[0]];
         $this->assertEquals((object) array(
             'questionid'     => $this->sa->id,
-            'maxmark'        => '5.0000000',
+            'maxmark'        => 5.0,
             'sequencenumber' => 2,
             'state'          => (string) question_state::$gradedwrong,
         ), $state);
@@ -170,7 +170,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[1]][$this->allslots[1]];
         $this->assertEquals((object) array(
             'questionid'     => $this->essay->id,
-            'maxmark'        => '10.0000000',
+            'maxmark'        => 10.0,
             'sequencenumber' => 1,
             'state'          => (string) question_state::$gaveup,
         ), $state);
@@ -295,7 +295,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[0]][$this->allslots[0]];
         $this->assertEquals((object) array(
             'questionid'     => $this->sa->id,
-            'maxmark'        => '5.0000000',
+            'maxmark'        => 5.0,
             'sequencenumber' => 2,
             'state'          => (string) question_state::$gradedright,
         ), $state);
@@ -303,7 +303,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[0]][$this->allslots[1]];
         $this->assertEquals((object) array(
             'questionid'     => $this->essay->id,
-            'maxmark'        => '10.0000000',
+            'maxmark'        => 10.0,
             'sequencenumber' => 2,
             'state'          => (string) question_state::$needsgrading,
         ), $state);
@@ -311,7 +311,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[1]][$this->allslots[0]];
         $this->assertEquals((object) array(
             'questionid'     => $this->sa->id,
-            'maxmark'        => '5.0000000',
+            'maxmark'        => 5.0,
             'sequencenumber' => 2,
             'state'          => (string) question_state::$gradedwrong,
         ), $state);
@@ -319,7 +319,7 @@ class question_engine_data_mapper_reporting_testcase extends qbehaviour_walkthro
         $state = $states[$this->usageids[1]][$this->allslots[1]];
         $this->assertEquals((object) array(
             'questionid'     => $this->essay->id,
-            'maxmark'        => '10.0000000',
+            'maxmark'        => 10.0,
             'sequencenumber' => 1,
             'state'          => (string) question_state::$gaveup,
         ), $state);
diff --git a/question/type/calculatedsimple/tests/helper.php b/question/type/calculatedsimple/tests/helper.php
index 5218994a2ae..2be6acd6401 100644
--- a/question/type/calculatedsimple/tests/helper.php
+++ b/question/type/calculatedsimple/tests/helper.php
@@ -240,7 +240,7 @@ class qtype_calculatedsimple_test_helper extends question_test_helper {
         $q->options->answers[0]->question = '3379';
         $q->options->answers[0]->answer = '{a} + {b}';
         $q->options->answers[0]->answerformat = '0';
-        $q->options->answers[0]->fraction = '1.0000000';
+        $q->options->answers[0]->fraction = 1.0;
         $q->options->answers[0]->feedback = '';
         $q->options->answers[0]->feedbackformat = '1';
         $q->options->answers[0]->tolerance = '0.01';
@@ -251,7 +251,7 @@ class qtype_calculatedsimple_test_helper extends question_test_helper {
         $q->options->units = array();
 
         $q->options->unitgradingtype = '0';
-        $q->options->unitpenalty = '0.1000000';
+        $q->options->unitpenalty = 0.1;
         $q->options->showunits = '3';
         $q->options->unitsleft = '0';
 
diff --git a/question/type/numerical/tests/helper.php b/question/type/numerical/tests/helper.php
index 650674b423c..c039098dd61 100644
--- a/question/type/numerical/tests/helper.php
+++ b/question/type/numerical/tests/helper.php
@@ -199,21 +199,21 @@ class qtype_numerical_test_helper extends question_test_helper {
         $q->options->answers = array();
         $q->options->answers[0] = new stdClass();
         $q->options->answers[0]->answer = '3.14';
-        $q->options->answers[0]->fraction = '1.0000000';
+        $q->options->answers[0]->fraction = 1.0;
         $q->options->answers[0]->feedback = 'Very good.';
         $q->options->answers[0]->feedbackformat = FORMAT_HTML;
         $q->options->answers[0]->tolerance = '0';
 
         $q->options->answers[1] = new stdClass();
         $q->options->answers[1]->answer = '3.142';
-        $q->options->answers[1]->fraction = '0.0000000';
+        $q->options->answers[1]->fraction = 0.0;
         $q->options->answers[1]->feedback = 'Too accurate.';
         $q->options->answers[1]->feedbackformat = FORMAT_HTML;
         $q->options->answers[1]->tolerance = '0';
 
         $q->options->answers[2] = new stdClass();
         $q->options->answers[2]->answer = '3.1';
-        $q->options->answers[2]->fraction = '0.0000000';
+        $q->options->answers[2]->fraction = 0.0;
         $q->options->answers[2]->feedback = 'Not accurate enough.';
         $q->options->answers[2]->feedbackformat = FORMAT_HTML;
         $q->options->answers[2]->tolerance = '0';
@@ -221,7 +221,7 @@ class qtype_numerical_test_helper extends question_test_helper {
         $q->options->answers[3] = new stdClass();
         $q->options->answers[3]->answer = '3';
         $q->options->answers[3]->answerformat = '0';
-        $q->options->answers[3]->fraction = '0.0000000';
+        $q->options->answers[3]->fraction = 0.0;
         $q->options->answers[3]->feedback = 'Not accurate enough.';
         $q->options->answers[3]->feedbackformat = FORMAT_HTML;
         $q->options->answers[3]->tolerance = '0';
@@ -229,7 +229,7 @@ class qtype_numerical_test_helper extends question_test_helper {
         $q->options->answers[4] = new stdClass();
         $q->options->answers[4]->answer = '*';
         $q->options->answers[4]->answerformat = '0';
-        $q->options->answers[4]->fraction = '0.0000000';
+        $q->options->answers[4]->fraction = 0.0;
         $q->options->answers[4]->feedback = 'Completely wrong.';
         $q->options->answers[4]->feedbackformat = FORMAT_HTML;
         $q->options->answers[4]->tolerance = '0';
@@ -237,7 +237,7 @@ class qtype_numerical_test_helper extends question_test_helper {
         $q->options->units = array();
 
         $q->options->unitgradingtype = '0';
-        $q->options->unitpenalty = '0.1000000';
+        $q->options->unitpenalty = 0.1;
         $q->options->showunits = '3';
         $q->options->unitsleft = '0';
 
diff --git a/question/type/truefalse/tests/helper.php b/question/type/truefalse/tests/helper.php
index 359ade0b9ee..78850acb938 100644
--- a/question/type/truefalse/tests/helper.php
+++ b/question/type/truefalse/tests/helper.php
@@ -111,13 +111,13 @@ class qtype_truefalse_test_helper extends question_test_helper {
         $q->options->answers = array();
         $q->options->answers[0] = new stdClass();
         $q->options->answers[0]->answer = 'True';
-        $q->options->answers[0]->fraction = '1.0000000';
+        $q->options->answers[0]->fraction = 1.0;
         $q->options->answers[0]->feedback = 'This is the right answer.';
         $q->options->answers[0]->feedbackformat = FORMAT_HTML;
 
         $q->options->answers[1] = new stdClass();
         $q->options->answers[1]->answer = 'False';
-        $q->options->answers[1]->fraction = '0.0000000';
+        $q->options->answers[1]->fraction = 0.0;
         $q->options->answers[1]->feedback = 'This is the wrong answer.';
         $q->options->answers[1]->feedbackformat = FORMAT_HTML;