diff --git a/src/UglyToad.PdfPig.Tests/Dla/DocstrumBoundingBoxesTests.cs b/src/UglyToad.PdfPig.Tests/Dla/DocstrumBoundingBoxesTests.cs
index 2df80b91..831c1215 100644
--- a/src/UglyToad.PdfPig.Tests/Dla/DocstrumBoundingBoxesTests.cs
+++ b/src/UglyToad.PdfPig.Tests/Dla/DocstrumBoundingBoxesTests.cs
@@ -3,7 +3,8 @@
     using System.Collections.Generic;
     using System.Linq;
     using UglyToad.PdfPig.DocumentLayoutAnalysis.PageSegmenter;
-    using UglyToad.PdfPig.DocumentLayoutAnalysis.WordExtractor;
+    using UglyToad.PdfPig.DocumentLayoutAnalysis.WordExtractor;
+    using UglyToad.PdfPig.Fonts.SystemFonts;
     using Xunit;
 
     public class DocstrumBoundingBoxesTests
@@ -70,10 +71,18 @@
             }
         };
 
-        [Theory]
+        [SkippableTheory]
         [MemberData(nameof(DataExtract))]
         public void GetBlocks(string name, string[] expected)
         {
+            if (name == "90 180 270 rotated.pdf")
+            {
+                // The 'TimesNewRomanPSMT' font is used by this particular document. Thus, results cannot be trusted on
+                // platforms where this font isn't generally available (e.g. OSX, Linux, etc.), so we skip it!
+                var font = SystemFontFinder.Instance.GetTrueTypeFont("TimesNewRomanPSMT");
+                Skip.If(font == null, "Skipped because the font TimesNewRomanPSMT could not be found in the execution environment.");
+            }
+
             var options = new DocstrumBoundingBoxes.DocstrumBoundingBoxesOptions() { LineSeparator = " " };
             using (var document = PdfDocument.Open(DlaHelper.GetDocumentPath(name)))
             {
diff --git a/src/UglyToad.PdfPig.Tests/Fonts/SystemFonts/Linux.cs b/src/UglyToad.PdfPig.Tests/Fonts/SystemFonts/Linux.cs
index ba99acce..5959b7f7 100644
--- a/src/UglyToad.PdfPig.Tests/Fonts/SystemFonts/Linux.cs
+++ b/src/UglyToad.PdfPig.Tests/Fonts/SystemFonts/Linux.cs
@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using UglyToad.PdfPig.Fonts.SystemFonts;
 using UglyToad.PdfPig.Tests.Dla;
 using Xunit;
 
@@ -21,11 +22,15 @@ namespace UglyToad.PdfPig.Tests.Fonts.SystemFonts
             },
         };
 
-        [Theory]
+        [SkippableTheory]
         [MemberData(nameof(DataExtract))]
         public void GetCorrectBBoxLinux(string name, object[][] expected)
-        {
-            // success on Windows but LinuxSystemFontLister cannot find the 'TimesNewRomanPSMT' font
+        {
+            // success on Windows but LinuxSystemFontLister cannot find the 'TimesNewRomanPSMT' font
+            var font = SystemFontFinder.Instance.GetTrueTypeFont("TimesNewRomanPSMT");
+
+            Skip.If(font == null, "Skipped because the font TimesNewRomanPSMT could not be found in the execution environment.");
+            
             using (var document = PdfDocument.Open(DlaHelper.GetDocumentPath(name)))
             {
                 var page = document.GetPage(1);
diff --git a/src/UglyToad.PdfPig.Tests/Parser/Parts/FileHeaderParserTests.cs b/src/UglyToad.PdfPig.Tests/Parser/Parts/FileHeaderParserTests.cs
index 70d6d4d1..cc3a1cda 100644
--- a/src/UglyToad.PdfPig.Tests/Parser/Parts/FileHeaderParserTests.cs
+++ b/src/UglyToad.PdfPig.Tests/Parser/Parts/FileHeaderParserTests.cs
@@ -48,7 +48,7 @@
             var result = FileHeaderParser.Parse(scanner, false, log);
 
             Assert.Equal(1.2m, result.Version);
-            Assert.Equal(9, result.OffsetInFile);
+            Assert.Equal(TestEnvironment.IsUnixPlatform ? 7 : 9, result.OffsetInFile);
         }
 
         [Fact]
@@ -70,7 +70,7 @@
             var result = FileHeaderParser.Parse(scanner, false, log);
 
             Assert.Equal(1.2m, result.Version);
-            Assert.Equal(13, result.OffsetInFile);
+            Assert.Equal(TestEnvironment.IsUnixPlatform ? 12 : 13, result.OffsetInFile);
         }
 
         [Fact]
@@ -82,7 +82,7 @@
             var result = FileHeaderParser.Parse(scanner, true, log);
 
             Assert.Equal(1.7m, result.Version);
-            Assert.Equal(13, result.OffsetInFile);
+            Assert.Equal(TestEnvironment.IsUnixPlatform ? 12 : 13, result.OffsetInFile);
         }
 
         [Fact]
@@ -94,7 +94,7 @@ three %PDF-1.6");
             var result = FileHeaderParser.Parse(scanner, true, log);
 
             Assert.Equal(1.6m, result.Version);
-            Assert.Equal(15, result.OffsetInFile);
+            Assert.Equal(TestEnvironment.IsUnixPlatform ? 14 : 15, result.OffsetInFile);
         }
 
         [Fact]
diff --git a/src/UglyToad.PdfPig.Tests/TestEnvironment.cs b/src/UglyToad.PdfPig.Tests/TestEnvironment.cs
new file mode 100644
index 00000000..abc44914
--- /dev/null
+++ b/src/UglyToad.PdfPig.Tests/TestEnvironment.cs
@@ -0,0 +1,9 @@
+namespace UglyToad.PdfPig.Tests
+{
+    using System;
+
+    public static class TestEnvironment
+    {
+        public static readonly bool IsUnixPlatform = Environment.NewLine.Length == 1;
+    }
+}
diff --git a/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj b/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj
index 7d1c6f49..6f7f0f5e 100644
--- a/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj
+++ b/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj
@@ -101,6 +101,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="Xunit.SkippableFact" Version="1.4.13" />
   </ItemGroup>
 
   <ItemGroup>