diff --git a/.github/workflows/tests-all.yml b/.github/workflows/tests-all.yml
index a7346bed..a4f3a718 100644
--- a/.github/workflows/tests-all.yml
+++ b/.github/workflows/tests-all.yml
@@ -6,9 +6,9 @@ env:
 
 on:
   push:
-    branches: [ Pharo12 ]
+    branches: [ Pharo13 ]
   pull_request:
-    branches: [ Pharo12 ]
+    branches: [ Pharo13 ]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        smalltalk: [ Pharo64-12 ]
+        smalltalk: [ Pharo64-alpha ]
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
     steps:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 36743be6..a14b2a3a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -25,7 +25,7 @@ jobs:
       - uses: hpi-swa/setup-smalltalkCI@v1
         id: smalltalkci
         with:
-          smalltalk-image: Pharo64-12
+          smalltalk-image: Pharo64-alpha
       - run: smalltalkci -s ${{ steps.smalltalkci.outputs.smalltalk-image }}
         shell: bash
         timeout-minutes: 15
diff --git a/src/Microdown-HTMLExporter/MicHTMLStyler.class.st b/src/Microdown-HTMLExporter/MicHTMLStyler.class.st
index fef8cfb8..81c61570 100644
--- a/src/Microdown-HTMLExporter/MicHTMLStyler.class.st
+++ b/src/Microdown-HTMLExporter/MicHTMLStyler.class.st
@@ -129,7 +129,7 @@ MicHTMLStyler >> frameworks [
 { #category : 'testing' }
 MicHTMLStyler >> hasCssSelection [
 
-	^ self cssListPresenter isNotNil and: [ self cssListPresenter selection isEmpty not ]
+	^ self cssListPresenter isNotNil and: [ self cssListPresenter selection isNotEmpty ]
 ]
 
 { #category : 'testing' }
diff --git a/src/Microdown-RichTextComposer-Tests/MicParsesAndRendersAllCommentsTest.class.st b/src/Microdown-RichTextComposer-Tests/MicParsesAndRendersAllCommentsTest.class.st
index adb225fb..7c2389ba 100644
--- a/src/Microdown-RichTextComposer-Tests/MicParsesAndRendersAllCommentsTest.class.st
+++ b/src/Microdown-RichTextComposer-Tests/MicParsesAndRendersAllCommentsTest.class.st
@@ -24,40 +24,10 @@ MicParsesAndRendersAllCommentsTest >> testCommentFromChunkReadStream [
 ]
 
 { #category : 'tests' }
-MicParsesAndRendersAllCommentsTest >> testCommentFromConfigurationCommandLineHandler [
-	Microdown asRichText: MicRichTextComposer comment.
-	"Command line handler for dealing with Metacello configurations from the command line
-
-Usage: config [--help] <repository url> [<configuration>] [--install[=<version>]] [--group=<group>] [--username=<username>] [--password=<password>][--no-quit][--no-save]
-	--help              show this help message
-	--no-quit        keep the image running after configuration install
-	--no-save       Don't save the image after configuration install
-	<repository url>    A Monticello repository name 
-	<configuration>     A valid Metacello Configuration name
-	<version>           A valid version for the given configuration
-	<group>             A valid Metacello group name
-	<username>          An optional username to access the configuration's repository
-	<password>          An optional password to access the configuration's repository
-	
-Examples:
-	# display this help message
-	pharo Pharo.image config
-	
-	# list all configurations of a repository
-	pharo Pharo.image config $MC_REPOS_URL
-	
-	# list all the available versions of a confgurtation
-	pharo Pharo.image config $MC_REPOS_URL ConfigurationOfFoo
-	
-	# install the stable version
-	pharo Pharo.image config $MC_REPOS_URL ConfigurationOfFoo --install
-	
-	#install a specific version '1.5'
-	pharo Pharo.image config $MC_REPOS_URL ConfigurationOfFoo --install=1.5
-	
-	#install a specific version '1.5' and only a specific group 'Tests'
-	pharo Pharo.image config $MC_REPOS_URL ConfigurationOfFoo --install=1.5 --group=Tests
-"
+MicParsesAndRendersAllCommentsTest >> testCommentFromFluidBuilder [
+	"Test that we do not break on empty code blocks"
+	Microdown asRichText: '```
+```'
 ]
 
 { #category : 'tests' }
diff --git a/src/Microdown-RichTextComposer/MicRichTextComposer.class.st b/src/Microdown-RichTextComposer/MicRichTextComposer.class.st
index 3e1447ba..d25b1627 100644
--- a/src/Microdown-RichTextComposer/MicRichTextComposer.class.st
+++ b/src/Microdown-RichTextComposer/MicRichTextComposer.class.st
@@ -639,7 +639,9 @@ MicRichTextComposer >> visitPharoEvaluator: aScriptBlock [
 	canvas := oldCanvas.	
 
 	codeText addAttribute: (MicRichTextDoIt new 
-		actOnClickBlock: [ self class evaluate: script ];
+		actOnClickBlock: [ OpalCompiler new
+			source: script;
+			evaluate ];
 		yourself).
 
 	"this is a hack, because the align of the icon is attached to some top-left of the 
diff --git a/src/Microdown/MicAbstractBlock.class.st b/src/Microdown/MicAbstractBlock.class.st
index 8ff2ac8c..8305b038 100644
--- a/src/Microdown/MicAbstractBlock.class.st
+++ b/src/Microdown/MicAbstractBlock.class.st
@@ -94,6 +94,13 @@ MicAbstractBlock >> computeNestedLevel [
 	^ 0
 ]
 
+{ #category : 'properties' }
+MicAbstractBlock >> hasProperty: aKey [
+	"Test if the property aKey is present."
+	
+	^ self properties isNotNil and: [ self properties includesKey: aKey ]
+]
+
 { #category : 'accessing' }
 MicAbstractBlock >> indent [
 	^ parent indent
diff --git a/src/Microdown/MicFigureBlock.class.st b/src/Microdown/MicFigureBlock.class.st
index fbd11a8a..62205251 100644
--- a/src/Microdown/MicFigureBlock.class.st
+++ b/src/Microdown/MicFigureBlock.class.st
@@ -26,8 +26,20 @@ MicFigureBlock class >> closingDelimiter [
 
 { #category : 'accessing' }
 MicFigureBlock class >> openingDelimiter [
+  
+    ^ FigureNameOpenerMarkup
+]
+
+{ #category : 'testing' }
+MicFigureBlock >> hasAnchor [
+
+	^ self anchor isNotNil
+]
 
- 	^ FigureNameOpenerMarkup
+{ #category : 'testing' }
+MicFigureBlock >> hasCaption [
+	
+	^ captionElements isNotNil 
 ]
 
 { #category : 'visiting' }