diff --git a/Tests/test_reports.py b/Tests/test_reports.py
index 979773da..c1cead1a 100644
--- a/Tests/test_reports.py
+++ b/Tests/test_reports.py
@@ -964,7 +964,7 @@ def test_multivariateqcreport_analytical(self):
 
 				for testFile in testFiles:
 					expectedPath = os.path.join(tmpdirname, 'graphics', 'report_multivariateAnalytical', testFile)
-					print(expectedPath)
+					#print(expectedPath)
 					self.assertTrue(os.path.exists(expectedPath))
 
 
diff --git a/nPYc/plotting/_plotTIC.py b/nPYc/plotting/_plotTIC.py
index 8d0ed895..d4b582e5 100644
--- a/nPYc/plotting/_plotTIC.py
+++ b/nPYc/plotting/_plotTIC.py
@@ -73,7 +73,8 @@ def plotTIC(dataset, addViolin=True, addBatchShading=False,
 		msData.applyMasks()
 
 	# List unique classes in msData.sampleMetadata[colourBy]
-	uniq = msData.sampleMetadata[colourBy].unique()
+	uniq_classes = msData.sampleMetadata[colourBy].unique()
+	uniq = [str(i) for i in uniq_classes]
 
 	if colourType == 'categorical':
 
@@ -150,7 +151,7 @@ def plotTIC(dataset, addViolin=True, addBatchShading=False,
 
 	# Colour by categorical class
 	if colourType == 'categorical':
-		uniq = msData.sampleMetadata[colourBy].unique()
+		#uniq = msData.sampleMetadata[colourBy].unique() defined above
 		palette = {}
 		sampleMasks = [] # sampleMasks = list()
 		for u in uniq: